How to measure your face for glasses

How to measure your face for glasses

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How to measure your face for glasses

If the glasses slid down your face every three minutes, it would be a very annoying thing. Thus, before prescribing a pair of glasses, you need to measure your face to fit it. While there are many measuring apps available, nothing is more accurate than taking the measurements yourself.

So, in the following section, we will show you how to measure face for glasses frames. It just needs a few steps.

How to Measure Face for Glasses Frames

In this section, we will show you how to measure face for glasses frames.

1. Measure the bridge of your nose. The bridge measurement determines the distance between the two lenses. If the bridge size is too large for your nose, your glasses will slip down your nose all the time. So, to measure the bridge of your nose, use the mirror or a photo to find the position and width of your nose bridge.

If it’s situated above your pupils, you need glasses that are between 19 millimeters and 21 millimeters. If the bridge is located below the pupils, you should look for a bridge size between 16 millimeters and 18 millimeters. For more information about PD, you can read the post: What Is Pupillary Distance and How to Measure PD.

2. Next, look at your face from the front and narrow down the range of bridge sizes to suit your face. If your eyes are set farther apart, your bridge size would be wide. So, you need to adjust the glasses’ bridge accordingly.

3. Then check your bridge position and select the glasses with a high bridge or low bridge.

Find your perfect sunglasses size in 2 easy steps:

Step 1: Look in a mirror and hold a ruler horizontally across your face. Measure in inches the distance between your left and right temples.

Step 2: Then use the chart below to convert your measurement to the best frame size to fit your face.


You may also use a pair of sunglasses you currently own to determine your best size. Frame sizing is typically noted on the inside of either temple (see illustration below). The eye/lens size is usually first, then the bridge size, then temple size. Use the eye/lens size to determine the best frame size.

The eye size is typically going to be the most important size for identifying how a pair of sunglasses will look. The eye size number measures the width of the lens, measured from the bridge, in millimeters. The bridge width is the distance between the lenses in millimeters. And the third number is the length of the temple in millimeters.

Note: If the eye size is not indicated on the temple, look under the bridge.

Optical Sizing Info

Looking to add a prescription lens to one of our frames?
The attached downloadable documents contain useful information for ensuring a perfect fit.

To download the documents, please click on the links below:
Download Size Chart
Download Frame Dimensions

How to measure your face for glasses

Small Medium Large
Our Small Frames have a lens diameter of 50mm and less. Our Medium Frames have a lens diameter ranging from 51mm to 53mm. Our Large Frames have a lens diameter of 54mm and up.

Find your size

Looking for your best Eyeglass Fit? We’ve your back! There are 2 different ways you can easily find your size. We’ll show you how! below are the methods, choose which works best for you!

1-Already Have Eyeglasses? Check the numbers

Take a look at the inside temple of your glasses. Some pairs have a three-number sizing code. If yours do, the measurements appear in this order:

lens diameter – 54 | bridge width – 16 | temple length – 140

How to measure your face for glasses How to measure your face for glasses

If your lens diameter measurement is:

50mm or less Shop Small Frames

between 51mm and 53mm Shop Medium Frames

54mm or greater Shop Large Frames

2-Measure your head

If you don’t have a pair of eyeglasses on hand, measure your face from Ear to Ear with a ruler instead. For best results, hover the ruler over your face so that it hits right below your eyebrows.

How to measure your face for glasses

Size does matter, at least when it comes to buying the right pair of glasses. Not sure about which size you need?

Let’s find out how to measure your glasses’ frame size.

If you aren’t sure how to measure your face shape, or to find glasses and sunglasses that match your look, read our sunglasses guide!

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1. Learn how to read glasses and sunglasses measurements

Before you write down any numbers, you need to know where to find the size measurements of your glasses. So take a closer look at the temples (‘arms’) of your eyewear.

Inside the temple, you’ll find numbers that look like this: 51–19–144.

Those measurements translate as:

  • Lens width (e.g. 51 mm): Lens width is the horizontal diameter of the lens at its widest point. In optometry, another term used for that is ‘eye size’.
  • Bridge width (e.g. 19 mm): The bridge is the part that joins the two lenses and sits over the nose. Some refer to this as the ‘gap’. The bridge width varies between 14 and 24 millimetres.
  • Temple length (e.g. 144 mm): The temple is the ‘arm’ that keeps the sunglasses on your face. That ‘arm’ extends to the part that hooks over the ear. The length is usually 135, 140 or 145 millimetres.
  • Lens height: Lens height is the vertical size of the lens, that is from the top to the bottom of the lens. Although sizes may differ depending on the brand, the standard size is somewhere between 32 and 38 millimetres.

How to measure your face for glasses

2. Check a pair of old glasses or sunglasses

It would be ideal to use a pair of old glasses or sunglasses that fit your face perfectly. Alternatively, try on a pair from a friend, to see if it fits you.

If you look closely at the inscriptions on its frames, you will see digits that will help you find the right size for your new glasses.

Keep in mind, however, that each pair of glasses is different, and the fit can depend on the manufacturer.

Most often, you’ll find the size information on the inside of the left temple.

How to measure your face for glasses

Here’s a discount offer for you.

Click the button below to get £5 off any pair of glasses.

3. Measure the glasses and sunglasses size with a ruler

If you haven’t found any digits or specifications on your old sunglasses or glasses, don’t panic. It’s an opportunity to use your measuring skills.

Take a ruler or a tape measure and carefully measure the size of the glasses, following the graphic below.

Since we don’t want to confuse you with lots of numbers in our online shop, we label our glass S (small), M (medium) or L (large), according to the lens width.

How to measure your face for glasses

Once you have the correct measurements, head over to our sunglasses section and find your favourite pair.

4.: Use a credit card

A different use of your card, not involving buying your favourite things, but it works. Did you know that the short side of a credit card is approximately the same as the width of a medium size glasses lens?

The size of most credit cards is 85.60 mm × 53.98 mm (3 3⁄8 × ​2 1⁄8 inches)

Here’s how to measure with a credit card:

How to measure your face for glasses

  • Take any credit or debit card.
  • Stand in front of a mirror or place your smartphone somewhere steady and use your selfie camera. Place the credit card on the bridge of your nose and under your eyebrow.
  • If the edge of the card extends further than the edge of your eye, you are a small size (size: S)
  • If the edge of the card ends at the outer edge of your eye, you are a medium size (size: M)
  • If the edge of the card ends before the outer edge of your eye, you are a large size (size: L).

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How to measure your face for glasses

Here’s everything you need to know about finding your glasses measurements and getting the right glasses for you.

NEED A NEW PAIR OF GLASSES? Find an optical store near you.

How can I find my frame size?

If you have a pair of glasses that fit you well, you’re already halfway done! If you take a look on the inside of your arm pieces, you’ll see a few numbers separated by squares or dashes. Otherwise, you might find two numbers on the bridge of your frames. 

Here’s what those numbers mean:

The first number is lens width. It will probably be between 40 and 60 mm and is usually followed by a square symbol.

The second number is bridge width. It will likely be between 14 and 24 mm.

The third number is temple length. It’s probably between 120 and 150 mm and usually ends in a zero or five.

If there’s a fourth number listed, it’s your lens height. This is likely between 32 and 38 mm.

What’s my lens width?

How to measure your face for glasses

Lens width is the width of one of your lenses in millimeters, from one side to the other. You might hear this called eye size. 

This is the most important measurement to make sure your frames fit your eyes. When measuring this with a metric tape measure, make sure you just measure the lenses — not the frames.

What’s my bridge width?

How to measure your face for glasses

Bridge width is the distance between your two lenses, measured from the innermost point on each lens. Finding your proper bridge width will make sure your sunglasses or eyeglasses rest comfortably on the bridge of your nose. 

What’s my temple length?

How to measure your face for glasses

Temple length is the length of your glasses’ arm pieces. It’s the distance between the bend of the arm, all the way to where it meets the frame. While the length is probably between 120 and 150 mm, there are some common industry standards: 135, 140, 145 and 150 mm.

If you find yourself getting frequent headaches, it might mean your temples are too tight. The arms shouldn’t sit uncomfortably right against the back of your ears, but you don’t want any wiggle room, either.

If two arms of the same length don’t fit quite the same, your ears might not be perfectly symmetrical. That’s OK! You can get arms of slightly different lengths to adjust — that’s why your temple length might not end in zero or five.

What’s my lens height?

How to measure your face for glasses

Lens height is the distance between the lowest point on your lens to the top of the frame above it. This number can be influenced by the style of your glasses, but it can be important when figuring out what kind of bifocals or progressive lenses you need. 

Ultimately, you don’t need to concern yourself with your lens height unless you need those two styles of glasses. The most important thing is that the bottom of your frames shouldn’t rub against your cheek.

What else should I measure?

One more easy measurement to calculate is your frame width. This is the distance between the ends of your frames, including hinges. This number can be handy so you know if your frames are too narrow or too wide for your face.

You can also measure your pupillary distance. This is an especially important number to know when getting fitted for progressive lenses and can save you a lot of eye strain.

When you know your measurements, you can make sure your next pair of glasses fits great.

How to measure your face for glasses

When it comes to buying glasses for the first time, there are a few things you need to consider. From the look and feel of the frames or the style / colour to the shape of the lens or the options of full rim, half rim and rimless, there’s a lot to think about. First and foremost, you need to think about comfort and fit and this can sometimes be determined by the size of the frame, the length of the nose bridge, or the size of the lenses.

Secondly, you need to choose a style that suits your face shape. If you require glasses for doing day to day tasks such as driving, computer work and reading, then it’s important to find a pair of frames that you enjoy wearing. After all, you will likely be wearing your specs all day, everyday. So choosing a style that complements your wardrobe and your face shape makes all the difference to your confidence. When you’re selecting your glasses online for the first time, it’s very important that you get this right.

Shopping online at SelectSpecs is one of the most convenient ways to order new frames, whether they’re sunglasses or prescription glasses. And whilst the process is easy and hassle-free, it certainly helps to have a good understanding of what frames are best for your face. You should also know your pupil distance measurement when ordering your lenses – whilst your optician’s prescription provides all the other essential info, sometimes the PD measurement is missing. But not to worry, as you can also measure this yourself at home.

If you need help shopping for your perfect pair of glasses at SelectSpecs, here are the top 5 apps that might help you!

1. Face Shape Meter from VisTech.Projects (£0.99)

For just £0.99, this handy little app will help you determine your face shape, something that many people find difficulty in doing. Face Shape Meter lets you upload a photo of yourself and provides a tracing tool so you can draw around your face, then you press the button to have your face shape automatically calculated. For the best results, you should direct your head straight at the camera and use a neutral expression. But if you’re unsure, you always have the option of taking a few photos and trying again.

2. Glasses Camera from Keliang Li (free)

This is a fantastic app for first time buyers of glasses or sunglasses online. It allows the user to take a selfie and then you can browse through different glasses/sunglasses styles to try on virtually. There are a hundred different styles so you can play around with looks until you find the one you’re happy with. You can even save images or directly share them from the app with your friend to get a second opinion. Simple interface and lots of fun to use!

3. Glassify from XLabz Technologies (free)

Glassify is another virtual try-on tool, but this one is pretty smart as it combines a face shape guide with hundred and hundreds of popular styles to help you find your perfect look. Many of the glasses and sunglasses styles available emulate popular brands in colourway/ shape/ design so it will really help you shop.

4. Virtual Dressing Room from Mikhail Zelin (free)

If you want more than just a digital glasses try-on app, why not download Virtual Dressing Room by Mikhail Zelin? This virtual wardrobe app is so much fun and you can combine different styles of spectacles with new haircuts or different styles of clothing. This will really help if you want a pair of glasses that look great with everything you wear!

5. PD Meter from Tech Positive (free)

And last but not least is this super useful PD Meter app, which successfully measures your pupillary distance (PD measurement). This is an important part when ordering your prescription lenses online, especially if you have a strong prescription. For low prescriptions, selecting the ‘average PD’ option is fine but if you want to be extra sure that your glasses are optimised for your eyes, measuring your PD is the best way.

Whilst this can be done with a measuring tape or ruler when looking into the mirror, it can be tricky measuring and keeping your eyes straight ahead at the same time. This app solves the problem by capturing your photo and measuring the distance for you.

For more tips on measuring your PD, visit this section of the SelectSpecs website. Or for more tips on determining your face shape, take a look at this blog post.

Tag #SelectSpecsSelfie for a chance to be featured on our page!

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Mags is a freelance fashion writer and blogger. She is ever so slightly short-sighted. When it comes to glasses, she is still searching for “the one”. She now writes about them on a regular basis to tease herself with what could have been.

How to measure your face for glasses

Finding the ideal eyeglass frame size is super important when buying glasses online. But did you know it’s also super-simple? For the great majority of people M is the right size. It is very likely it is going to be the correct size for you too.

To be sure, use one of the following techniques to find the size of the glasses:

Learn how to read glasses and sunglasses measurements

The best place to start is with the eyeglass measurements on a pair you already own. Take a closer look at the temples (arms) of your eyewear. Search for the three little numbers on the inside of the temple of your glasses. These three numbers are the frame’s measurements. They will look somewhat like this: 51□19 144

From left to right, these eyeglass measurements appear in the following order: lens width, bridge width, temple length. Sometimes a fourth number will be noted on the arms, which is your lens height. All of these measurements are in millimeters.

How to measure your face for glasses Lens Width
This is the horizontal width of each lens at its widest point. It typically ranges from 40mm to 60mm.
How to measure your face for glasses Bridge Width
This is the distance between your two lenses. In short, the bridge width is the space where your frames fit against your nose. The size of this piece ranges from 14mm to 24mm.
How to measure your face for glasses Temple Length (Arm Length)
This is the length of the temple from each screw to its temple tip, including the bend that sits on your ear. This measurement does not vary as much as the others. The temple is typically 120mm to 150mm long.
How to measure your face for glasses Lens Height
This is the vertical height of your eyeglass lenses at the widest point of the lens within the frame. The lens height is important when measuring bifocals or progressive lenses.

In some cases you will know the Width of the Whole Frame.

How to measure your face for glasses This measurement is not printed on the temple of your glasses. To find it, take your measuring tape and measure horizontally across the front of your frames, including any hinges or design features that stick out on the sides.

Converting measurements to glasses size

Once you know the measurements of your current glasses, you can easily convert those to sizes – small, medium and large. To do that just add lens width + bridge width.
For example, if measurements are 51□19 144 we can add lense width 51 and bridge width 19 to get 70. Then we consult the tabel below to see that our size would be medium (M).

Convert measurements to size
<66 XS
66-68 S
69-71 M
72-74 L
>74 XL

ℹ️ For all of our glasses we will also show measurements so you can compare those to your previous glasses. Note that even if measurement for lense or bridge width differs by 1mm, the glasses will still be a good fit.

How to find glasses size by measuring with a credit card

Yes, there really is another use of your card, apart from paying for your favourite purchases, and it works. You probably did not know that the size of a credit card in height is approximately the same as the width of a medium size glasses lenses! Below are instructions on how to find your glasses size by using credit card as measuring device.

Turn your iPhoneX (or newer iPhone) into a 3D body scanner and measurement device for purchasing prescription Rx glasses online. EyeMeasure enables you to measure your Pupillary Distance (eye to eye) & now Segment Height instantly at near and far distances. No mirrors, credit cards, tape measures or objects needed. It’s accurate to up to 0.5mm for the perfect prescription glasses.

Please note: iPhone X or newer is required for this app.

• Instant IPD measurements for near and far focal lengths.
• Instant Segment Height (SH) for progressive lens orders online.
• Perfect for use with Free Home Try-on glasses. Info in app on where to try this.
• Share with retailer for further analysis and measurements in 3D.
• Order online prescription glasses for the first time with confidence.

What’s New

Updated App icons.

Ratings and Reviews

Works perfectly

I’m planning on ordering an extra pair of glasses online but my eye doctor would only give me the machine measured pd and not the one he measured manually and used to order my glasses. I just wanted to double check that the number was correct since he wouldn’t tell me if his measurement was different from the machine one and I know that the manual measurement is probably more reliable since that’s what he actually used for the glasses I bought in-store. So, I got 68 from the doctor, my mom measured and got 68 and this app measured and got the same. Now I feel comfortable placing my order. Thanks so much for creating this app!

Waste of time

First, the complaint that many share: Why are there no instructions? As many others have stated, the app scanned my face continuously without displaying anything at all. After heading to the reviews hoping to find some hint of how to operate an app with NO buttons other than a useless contact page, I quickly realized that the developers promised instructions many times and never included them. The easiest fix is to include the instructions in the app description on the App Store. Please, take five minutes out of your day and update the app description to help all of us who are confused and irritated. The silliest response I saw was that the instructions were sacrificed to make the layout simplistic. Seriously? Omitting basic instructions for the sake of aesthetic is ridiculous. I won’t use this service. There are better, more accurate alternatives. that include instructions.

User hostile

Maybe I’m not as smart as other reviewers but I couldn’t get this to give me any results.

There are no instructions, no prompts, no error or tip messages, and nothing on their website. NOTHING. I’m using an iPad. Does it matter whether it’s in portrait or landscape orientation? I don’t know. What is the best location for the light source? No idea. Was there enough light when I used it? You got me! How many times does it need to scan your face? I wish I knew. How sensitive is it to movement? No clue. It seemed to scan my face over and over and that was all.

I guess if it works for you it’s supremely user friendly but for me it was user hostile. I realize this is “free” and a lot of effort went into developing this but it would have been nice if a little more effort was expended to explain how it works. Something, anything that would help me use this properly.

App Privacy

The developer, Bonlook Inc , indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Everyone’s face is special and unique. To ensure a perfect fit, it is important to first determine the best frame size for your face. Before browsing our frames collection, look on the inside of your current pair of glasses or sunglasses, you’ll see inside the temple a number that looks like: 51 17 142. This information shows you the size of your glasses; the lens diameter, the bridge width and the side length, all measured in millimeters. If your current glasses fit well, it’s recommended that you choose glasses that have similar measurements. In the case of SAVANNA Eyewear eyeglasses, these dimensions are printed on the demo-lenses and the inner temple. The first number, the eye size, represents the horizontal width of the lenses through which your eyes see. The next size to consider is the bridge, the distance between your two lenses. Lastly, you need to know the temple size, the measurement from the screw to the temple tip, including the bend that sits on your ear.

How to measure your face for glasses

Eye size is the horizontal width of each lens at its widest point. SAVANNA Eyewear lenses typically range from 40mm to 60mm. Children’s sizes could be slightly smaller.

The bridge is the distance between the lenses. In other words, it’s the size of the “bridge” of the frame that rests on your nose. In most cases, the bridge size of our eyeglass frames and sunglasses range from 14 mm to 24 mm.

The temple is the “stem” or “arm” of the frame, measured from the frame hinge to the back tip of the temple. In this case, the temple length is 140 mm. Temple lengths generally range from 120 mm to 150 mm.

SAVANNA Eyewear classifies optical frame and sunglass sizes in three categories: small, medium, and large. Frame and sunglass categories slightly differ due to their different functions. Each pair is measured across the widest part of a lens, which is called the lens diameter. If the widest part of the lens is from top to bottom, then that would be the lens diameter.

How to measure your face for glasses

Sunglasses or eyeglasses are not just a style statement – they can attract or repel, be a mirror or a shield. If the eyes are the windows to the soul, then perfectly suited sunglasses are aptly called shades. That’s precisely why you need to understand your shape and find the perfect fit with the goal of accentuating your best facial features. Finding the best sunglasses for your face doesn’t have to be a daunting, mysterious process. It’s actually really simple, so why does it seem so confusing? Choosing sunglasses is all about size and proportion, but most advice focuses on face shape. The most recognized face shapes are as follows:

How to measure your face for glasses

Your face is widest at the cheekbones and narrowly tapers to your chin. Square frames will complement a narrower chin, adding different angles. Square, wayfarer, and club master styles will work well for you. Avoid anything oversized or teardrop shaped.

How to measure your face for glasses

Your face is so symmetrical that almost every shape flatters it. Similar to those who are square faced, you want to go with softer lines and rounded corners. Wayfarer styles, rectangular, and square frames work well. Avoid small or narrow frames.

How to measure your face for glasses

Your face is longer than it is wide, your cheekbones are the widest part of your face, and your jaw is soft without any sharp angles or points. It’s hard to go wrong with an oval face, most sunglasses – round, aviator and square – will look great on you.

How to measure your face for glasses

You have full cheeks and a softly rounded forehead and chin. Stay away from circles, unless you want to over-accentuate the round shape of your face. Aim high with aviators or stick to square, angular frames.

How to measure your face for glasses

You face is strong and broad, you have a more angular jawline, and your forehead, cheekbones, and jaw will all span the same width. Aviator, square, and round frames will match you in width, but with soft lines. Too many hard angles won’t do you any favors.

How to measure your face for glasses

Buying the accurate size of an eyeglass frame is a technical issue for those who are quite fresh in it for those who are facing this for the first time in their life. When the topic arrives to buying a prescription eyeglass from any online store such as, which is amongst the top 5 highly-rates companies, serving their consumers for a long time, we will guide you through the whole process effortlessly and expediently.

Since we know that buying eyeglasses is not something that we do on a regular basis, so it must be done perfectly, to get relieve for a long time. You must get what you’ve been exactly looking for without any struggle.

It is absolutely essential that you are fully aware of your frame size when looking an eyeglass wear on online deals as you might not get 100% accuracy if you haven’t provided the right pieces of information. Let us guide you via image details, so you can have an idea for your next or first-time frame’s measurements, so you get what your eyes need.

How to measure your face for glasses

We will now guide you to purchase the right spectacle for yourself either you have been purchasing for a long time but feel unsure about the size, or you are a first time buyer and have no knowledge regarding this stuff.

How to measure your face for glasses

The most fundamental rule when the matter comes to choosing the right size of your frame is that neither it should be too small or too large when you put it on your face. A frame that looks big on you would be also heavier and you will feel uncomfortable.

One more disadvantage of such big-sized frames is that they make your eyes look smaller than usual. In order to check whether you are wearing the correct sized frame, make sure that you should not be able to look out of the bottom or top and from the sides of the frames without looking through that area. Also, the lenses should shield around 80 to 90% of the area of your vision.

Nose Bridge is an essential element because even though the frame looks exceptionally attractive, it also assists someone to see clearer & better. The precise distance between both lenses aids decrease stress on the eyes, helps from slipping down the nose area, and does not smear much stress on the inner side of the eye.

How to measure your face for glasses

These elements are really imperative since such glasses that don’t fit suitably often lead to numerous issues such as marks on around the nose and eyes and also produces headaches and stress in your eyes.

One more chief concern while opting for the correct frames is the absolute center alignment, that helps someone see accurately. It means that the lenses are exactly in front of your eyes, which assists you to see clearly, with no pressure on your eyes areas.

How to measure your face for glasses

Well, this is really factual because heavy-weight frames become the reasons of headaches or strain in your eyes. The chances are greater that frames would slip from the nose if the weight is heavier. But we are not saying that you should just buy a lighter plastic frame since they are light-weight. We carry frames made of titanium which are even lighter yet stronger when matched to other sorts of frames.

The stress-free method if you already own a pair of frames that fits you 100% perfectly since you’ve been wearing it; check the measurements yourself as shown in the above image, and then search the inventory at Goggles4u that looks about the same as yours. If your pair does not have measurements mentioned, use a simple ruler to check its size.

How To Use Ruler For Measurement

This is quite simple. Just look at the mirror holding a ruler below your eyes (make sure it has millimeter units. Now, calculate the span between both sides of the temples. This will specify you what frame width will fit you accurately.

In most prescription eyeglasses, you will see exact measurements printed on the temples or sometimes behind the nose bridge as shown in the image.

For example, in an eyeglass frames where it reads 57- 20-135, it simply relates to an eye size of 57, bridge size of 20 with its temple length of 135.

A modifiable nose pad is another selection for people with smaller noses or lower bridge. These are some of the most crucial information that we shared with our customers, so that they have a peace of mind next time selecting the best yet right type of online prescription eyeglass at an amazing and discounted pric


Knowing your preferred frame sizes will allow you to purchase prescription glasses that not only fit well and are comfortable to wear, but also look good too as they will be in proportion to your face.

Frames have three basic measurements:

1) Eye size.
2) Bridge size.
3) Arms/temples size.

All of our product pages have these sizes displayed using the images below. Each measurement is shown in millimetres.

How to find frame measurements

All frames have these three sizes written on the inside of the arms or behind the bridge.

If you can’t see the numbers or they’ve worn away, you’ll need to measure the frame by hand. Simply get a ruler and measure them using the image guide below.

How to measure your face for glasses

Additional frame measurements:

The above measurements are the industry standard and will be written on all frames.

There are two additional frame sizes, provided by us on all product pages, which you can easily measure yourself and will help you to find the perfect fitting frame.

4) Frame width:

a) Simply measure the width of your existing frame

b) Measure the width of your temples

a) b) How to measure your face for glasses

5) Lens depth:

As the name suggests, it is the depth of the lens from top to bottom.

You will need to measure an existing frame to get this measurement.


Here are the basic measurements you should know when ordering glasses online. These will assist you in finding the perfect frame:

These three measurements are the most important:

a) Eye, Bridge, Arms/Temples

These two measurements are additional and will assist in finding the perfect fitting frame:

b) Lens depth, Frame width.

The image below shows all five measurements – look out for these on our site when purchasing your glasses:

How to measure your face for glasses

Just like a tailored suit, a pair of glasses should be properly fit to the wearer. A proper fitting frame is more flattering, more comfortable, and more effective at helping you see better or keeping the sun out of your eyes. Here’s quick guide to getting the right fit, which is unique for every person depending on your head size, face shape, feature distribution, etc.

Frame sizing

A frame size is typically noted as: lens width – bridge width – temple width. For example: 51mm – 21mm – 145mm.

The key is finding a size that corresponds to the overall width of your face, while being mindful of the distribution of the physical size of your eyes (lens width) versus the space between them (bridge width).

  • Small/Narrow Face: 125mm – 129mm
  • Medium Face: 130mm – 134mm
  • Large Face: 135mm – 139mm
  • Wide Face: 140mm – 145mm

The keys to proper eyewear fit

1. The width of the frame should match the width of your face. This means, when looking at you straight on, the glasses should not hang off the side of your face (this would mean the frame is too wide) and we should not be able to see the sides of the temples (this would mean the frame is too narrow).

2. We should be able to see your eyebrows above the frames. At least half of them, preferably a little more than half.

3. Each eyeball should be directly in the center of the lens, from left to right. The distance between the corner of the eye and the edge of lens should be the same on both sides of the eye.

4. Your eye should fill the top half of the lens. The bottom of the eye should roughly touch the vertical midpoint of the lens.

5. The temples should be adjusted to fit around your ears. If you have a problem with glasses sliding down your nose, you need to have the temples bent to keep them in place .

6. The overall frame should be located roughly in the middle of your face. It should provide a nice balance between the top of the face and the bottom of the face. In each of the examples below, notice there is roughly equal distance between the top of the frame and the top of the head, and the bottom of the from and the bottom of the chin.

Fitting examples

Will has a chiseled jaw, which is complemented nicely by the angular shape of these square lenses. Notice the eyebrow showing above the lens (a little more than half the brow, which is ideal) and his eyes filling up roughly the top half of the lenses. The dark tortoise coloring is a great tone for his fair skin and blond hair.

Color considerations

In addition to finding the proper shape and size for your face, you should also look for a frame (and lens) that compliments your natural coloring – meaning your skin, hair, and the colors you wear most often.

Lens color, as well as lens opacity, also make a big difference. For example, being able to see your eyes through the lenses of a pair of shades is a decidedly different look. In general, I would advise keeping your lenses dark enough that the eyes are barely visible. The majority of my shades are dark grey or brown, with the occasional dark purple or green, and a couple with gradient lenses which are a little more “fashion-y”. I never really got into the colored or reflective lenses, they both always seemed a little cheesy.

Final note

Lastly, if you’re in the market for a new pair of shades for the upcoming Spring season, I would advice you to shop local and try-on as many frames as possible before deciding on one. Bring a friend who’s opinion you trust. Don’t buy a style just because it looks cool on someone else; chances are their face shape is much different. The proper fit for your face is key.

Explore the ‘Optometry Blog’ on vision and eye health issues in Santa Cruz. Learn about local community events and relevant news relating to optometry.

How to measure your face for glasses

When it comes to looking good in glasses, it isn’t all about owning the most stylish frames of the moment, in fact it’s not that difficult at all to look stunning in even a simple pair of frames —if the frames fit.

If they fit your face shape, that is.

Eye glasses that compliment your face shape draw attention to your best features and away from your less-than-great features, adding an extra touch of gorgeous that can make a world of difference in your look.

How to measure your face for glasses

Your face shape plays a critical role when it comes to the kind of frames you look best in; different styles of frames will go better or worse with different face shapes.

Do you know your face shape?

Unless you have very prominent features, figuring this out may not be as easy as looking in the mirror or taking a selfie and taking a look at your face…upon first glance, most faces simply look face shaped.

Never fear, we’ve prepared a handy guide to help you figure out your face shape.

How to Figure Out Your Face Shape

Step 1: Find the widest part of your face.

Forehead: A wider forehead will usually give you an oval face shape, particularly if the width of your forehead tapers gradually towards your chin.

Cheekbones: A face widest at the cheekbones is typically of a round face shape, but how long a face is also plays into the overall shape of a face with wide cheekbones. With wide cheekbones, you can be sure you’ve got a round face shape if your face’s length and width are approximately equal.

Jaw: If the widest part of your face is your jaw, you likely have a square face shape. In square faces, the forehead, cheeks, and jawline all have almost equal widths.

Follow the next steps to be certain what face shape you have…

Step 2: Describe the shape of your jaw.

Round: A round jaw is, unsurprisingly, often a sign that you have a round face shape. If you have a round jaw, with a face equally as long as it is wide, you can confidently know you’ve got a round face shape. If your face is noticeably longer than it is wide you might have an oval face shape.

Square: A strong, defined jawline makes a face look more squarish. If you have an a strong jaw line, that is not pointed, then you have a square face shape.

Pointy: A wider forehead or cheekbones and a noticeably narrow, pointed chin almost always mean that you have a heart shaped face.

Figured out you have a square or heart shaped face? Skip on ahead to our face shape frames guide.

Still not sure whether you’ve got an oval or circle face? Continue on to the next step…

Step 3: How long is your face?

Short: All signs point toward the round face shape.

Long: If you haven’t already figured it out, if you’ve gotten this far you probably have an oval face.

No matter what your face shape, there frames that bring out the best in each. Knowing your own face shape will make it that much easier to make the right choice.

Now that you have the shape of your face, read on below about these types of face shapes and the best eyeglasses that compliment each of them.

Aside from trying on a whole bunch of sunglasses, there are some slightly more scientific ways to figure out how to find glasses that fit your face. These tips and tricks actually work for any glasses you want, and they can help you figure out what style will most compliment your shape and size. Sunglasses tend to be larger than eyeglasses, but the measurements are calculated the same way (just in case you ended up reading this and you’re looking for eyeglasses).

Start With Your Cranium

In order for measurements to work, you need an accurate measurement of your own head. That way, you’ll have a reference point for what size sunglasses you need. This will also help you ascertain what glasses are too big, and what frames will make you look like you’re squinting through tiny lenses.

Saying that you have a “big head” or a “small face” is valuable in layman’s terms, but it doesn’t help if you’re not standing in front of a whole bunch of glasses to try on. I don’t know about you, but I don’t have too much time for sunglass shopping.

How To Get The Millimeters

How to measure your face for glassesWhen measuring your face, you’ll need to line a ruler up (on the millimeter side) with the location of your temple. The ruler shouldn’t wrap around your head, instead, it should float in front of your face in the space where your temple is located. Then, measure straight across to the other temple. The measurement you get is the best frame size for your face.

Eyewear Measurements

Glasses have three primary sizes you need to know about.

Eye size is the width of the lenses at the widest part. It’s the most common measurement you’ll see in reference to the size of glasses. Ray-Ban New Wayfarer Sunglasses come in 52 mm and 55 mm lens sizes.

Bridge size measures the piece of metal or plastic that connects the lenses. In order to measure the bridge, you start and end at the innermost side of the lenses and measure to the same spot on the other side of the bridge.

Temple size is the measurement of the arms of the sunglasses. Also called the temples, the measurement of the arms starts at the hinges and continues in a straight line to the farthest point without sloping downward.

How to measure your face for glasses

There’s one more thing you might want to know, the vertical measurement tells you how tall your glasses are. This doesn’t always help unless you’re ordering prescription sunglasses that require special lenses but regardless, it is measured from the bottommost part of the lens straight up to the top.

Your Width Versus Theirs

General width will tell you how large the glasses are in total. You can then measure your face and see how many millimeters across it is to get a rough idea of how large the glasses will be. To figure this part out, measure the segments of the temples you can see from the front along with the lenses and bridge. That number will tell you roughly if the glasses are large enough for your face.

Estimate Your Match Up

If you know the total width of the sunglasses (including lenses, end pieces and bridge), you can in general, subtract 6 mm from the total and compare it to the width you calculated earlier. If it’s within 2 mm of your face size, they should be a good fit for you. If you don’t have the total width but you have the glasses to measure, add up the lenses multiplied by two with the bridge size. If that number is within 2 mm of your face size, you should be good to go with those glasses as well.

Get Ready! Get Tape!

Measuring your face sounds tedious, but it will make the process of buying and returning sunglasses much less hassle. Without the measurements, it’s really hard to tell if glasses have the right sized bridge or lenses to fit your face. It only takes a few seconds, but numbers can clarify a whole lot for you.

Our frames are categorized as either Narrow, Medium, and Wide to help you find the most comfortable and balanced pair of sunglasses.


Measurements for Bonnie Clyde glasses can be found printed on the inside of the temple arm. Most eyewear brands print these details in a similar spot; if you already have a pair that you like, you can compare measurements to see how a certain frame of ours will fit you.


LENS WIDTH (40-62mm)

This measurement determines the horizontal length of one lens. The average range is 40-62mm. A combination of this and Bridge Width will determined how centered your eyes are within each lens.

BRIDGE WIDTH (14-25mm)

This measurement determines the total horizontal length in between the two lenses. The average range is 14-25mm. A combination of this and Lens Width will determined how centered your eyes are within each lens.


This measurement determines the total length horizontal length of each temple arm. This is important to check how it will sit on your ears and how well they will stay on your face.



Round faces tend to have a softer jaw line and equal facial dimensions— your face is about as long as it is wide. Square or rectangular frames will balance nicely with your face.

  • Width and length of face is equal
  • Softer jawline
  • Softer chin


Heart-shaped faces tend to have broad foreheads and cheekbones, a strong jawline, and tapered defined chin. Many sunglasses will work with your face, but start with cat-eye or browline shapes to find balance between a broader forehead and tapered jawline.

  • Broad forehead
  • High cheekbones
  • Tapered jawline
  • Defined chin


Square faces tend to have broader foreheads with non-angled cheekbones. Their jawlines are defined and are not very angled either. This is a great face-shape to really shine with rounder frames, although, there’s nothing wrong with square shaped lenses either for a bolder look.

  • Broad forehead
  • Flatter, lower cheekbones
  • Softly-angeled chin
  • Softly-angled jawline

Oval faces are quite versatile. Most eyeglasses will complement your face well so don’t be afraid to have some fun with it. These faces tend to have narrower foreheads with higher cheekbones.

When buying your new prescription glasses the best thing to do is to start with a plan and this should include the measurement of the glasses that you have worn in the past that fit you well. This will ensure that you get the right frames for your face – and yes you should also look at the shape of the frame and how it will compliment you face but start with the measurement!

Ever by a shirt or pants without looking at the size? It’s the same thing with glasses. It is important to take into account all the various differences that come with a different size.

And even though most glasses put the lens, temple and bridge size the best first gage is the overall width of the frames.

That’s not to say that the other measurements are not important but the bridge width for example is on average around 15-20 mm. Even on the widest frame it may only have 16mm bridge – but the key is it may have adjustable nose pads. (More about how your glasses should fit) While you should look at the bridge – especially for plastic/acetate frames that have a set nose pad because if those are too wide they may just slip off – it’s not as important as the width.
The temples length too are adjustable – can be curved more around the ears, or less – to a very large extent so start with the width. Rest assured that usually the wider the frame the longer the temples will be.

How to measure your face for glasses

For a wider face it’s important to look at some wider frames 140mm+ . for a more narrower face it’s better to look at the more medium sized frames with the width inbetween 130mm-139mm. And for smaller or younger faces the small sized frames are good and these are sized inbetween 118mm-129mm.

We use mm instead of inches so that we can get more precise when we are dealing with smaller spaces unlike with clothing where the garments are bigger.

The width of one lens, edge to edge, from a frontal view.

Top to bottom measurement of the lenses from the highest point to the lowest point.

Measurement of the space between the two lenses, from the inside edge of the lenses over the bridge(nose) to the inside of the other lenses.

Measurement of the temple arm from the side of the lenses to the end of the earpiece.

The mechanism that is used to attach the temples to the front frame and the lenses.

And on our site each frame has the measurements in the description area (as well as on mouse over when browsing)

If you need any help ordering your glasses take a quick look at our glasses guide or give us a call

Our customer’s service is but a phone call/email away, we are standing by to assist you in every way. We will match any price for the same quality glasses.

How to measure your face for glasses

Glasses should feel comfortable, accentuate your features, and, of course, help you see.

Choosing glasses is about much more than your personal style preferences; it’s actually an important part of eye care. If you have the wrong fit, even if you love the frame style, you could experience eye strain, problems seeing properly, or even have troubling side effects, like nausea or headaches.

How to get the right fit

Check with your optician
Your optician will take measurements to help you find a properly fitting pair of glasses. He or she will look at your face shape, your prescription, and take measurements.

Without those measurements, it’s just about impossible to know which frame size you need.
The measurements that the optician takes will indicate which frames will fit you best, and you’ll be able to find corresponding measurements stamped on the inside of the glasses frame.

Know your measurements
On the inside of your eyeglasses (usually stamped on the temple or bridge), you should find three numbers separated by hyphens or dashes. These are the measurements that your optician is looking for, and they’re specified in millimeters (mm). For example: 52-20-140.

Even though millimeters are small, having any of these numbers off could result in big problems with your glasses. Here’s what each of those measurements stand for.

  • Lens width: The horizontal width of each lens at its widest point. A typical range is between 40mm to 60mm.
  • Bridge width: This refers to the bar in the center that sits on the bridge of your nose. The measurement is the distance between the lenses. Small bridge glasses are in the 14mm to 16mm range; medium bridge widths range from 17mm to 19 mm; and large bridge widths range from 20mm to 23 mm.
  • Temple length: The length of each arm, starting at the hinge. There aren’t as many options for temple length. They’re typically stated in increments of 5mm: 135mm, 140mm, 145mm, and 150mm.

Understand how glasses should look and feel

How glasses should fit your eyes
Your eyeglass frames should line up horizontally with the center of your eyes, and the frame should extend no higher than your eyebrows.

Your pupillary distance (PD) — the distance between your pupils in millimeters — is needed to determine where your eyes should align with your lenses. When you look straight ahead, the center of each pupil should be in the optical center of each lens. Getting this right is critical for your glasses to fit and function properly.

How glasses should fit your nose
Eyeglasses should rest on your nose without slipping or imprinting red marks on your nose. Your frames should feel like they are balanced or equally distributed across the bridge of your nose — you shouldn’t have to fuss with them.

How glasses should fit your cheeks
Your glasses shouldn’t rest on your cheeks when you smile. They should be level on your face.

How glasses should fit the side of your head
The temples of your eyeglass frames should feel secure around or over your ears, without pinching or feeling uncomfortable. If the width of the frames is just right for the width of your face, your glasses won’t budge when you look down and shake your head.

Common fit problems

What does it mean if…

…your glasses keep sliding down your face?
This could indicate that the frame is too narrow for your face.

…your glasses leave red marks on the bridge of your nose?
This probably means that your glasses are too tight, or the frames might be bent or crooked. If your glasses are indeed the right fit, adding nose pads could do the trick.

…your glasses pinch your head or dig into the spot behind your ears?
The temples of your glasses probably aren’t hugging your ears the way they should.

…your glasses feel crooked?
Most people have crooked eyebrows, which can make your glasses appear crooked. Check the straightness of your glasses by looking at the bottom of your eyes, not your eyebrows. Sometimes, people’s ears don’t line up, which could also cause glasses to feel crooked.

Is it time for your eye exam and a new pair of fresh frames? Make an appointment with your eye doctor to get started finding those perfectly fitting glasses today, or learn more about our services.

How to measure your face for glasses

Purchasing a new pair of eyeglasses can be easy, especially when it is done through an online store. But, you need to understand the importance of knowing the right measurements and the size of your spectacles, so that they are comfortable and perfect for your face. It is important to choose comfortable eyeglass sizes because you will be wearing them for most of the day, so they have to feel and look good. Look for frames that are not too heavy or small, they shouldn’t hurt the bridge of your nose or the back of your ears. Additionally, you wouldn’t want to sacrifice style for comfort; hence, you will want a frame style that suits your face shape and is functional.

When choosing the right you need to keep in mind the following questions:

  • Are you going to use them daily?

– If the answer is yes, then you will need a sturdy pair

  • Are you looking for a pair that will be worn for special occasions?

– If so, then you must look for a pair that is light and has a colorful frame

Another important aspect you must consider is your lifestyle and environment, when checking an eyeglass frame measurement chart, you will need spectacles that can withstand external elements and won’t break easily or slide down your nose constantly. You can always consult an eyeglasses sizes chart to know about measurements that will keep the spectacles in place, on your face.

Understanding your eyeglass sizes is crucial because you wouldn’t want to be constantly distracted by uncomfortable and ill-fitting eyeglasses. In this article, we will go through the various measurements you must check, before selecting eyewear; this guide will be helpful if you are planning to purchase the glasses online.

Measuring your Eyeglasses:

How to measure your face for glasses

Whether you are trying to find the best spectacles for casual or daily wear, you need to know how to measure various parts of the eyeglasses to get a precise fit. Let’s have a look at the various measurements you must take, to find the perfect eyeglasses.

How to find the right frame size?

If you have an old pair of glasses that have the right fit, then you are halfway there! Take a look at the inside portion of the arm pieces, and you will see numbers that are separated by dashes and squares. If you don’t find them on the arm, you may find the numbers on the bridge of the frames.

The numbers may seem confusing at first, but here is what they mean:

  • The first number signifies the lens width, it will be between 40 and 60mm. This measurement is followed by a square icon
  • The second number will tell you the bridge width, and it will be between 14 to 24 mm
  • The third number signifies the temple length, and it is probably between 120 and 50mm. This measurement will usually end in zero and five
  • The measurements will usually end with three units, if you find four units then the latest will usually be between 32 and 38 mm

How to identify your lens width?

The lens width is measured in millimeters, from one side to the other. This is also known as eye size. This measurement is crucial because it ensures that your frames will fit your eyes perfectly. When measuring the lens, you must do it with a metric tape measure and measure the lenses and not the frames.

How to measure the bridge width?

The bridge width is measured according to the distance between the two lenses. Which means you have to measure from the innermost point of each lens. Once you find the proper bridge measurements for your eyeglass or sunglass, it will stay on your nose securely and it doesn’t slide off.

Measuring the temple length:

The temple length signifies the length of the eyeglasses ’ arm pieces. It’s the distance between the arms bend and its meeting point on the frame. The length is usually between 120 and 150 mm. Some common industry standards include 130, 140, and 150 mm. If you are experiencing frequent headaches then it can mean that the eyeglass arms are too tight, and they are not sitting comfortably behind your ears. It’s fine if the arms are of slightly different lengths, you can adjust them. The temple length measurements may not always end in five or zero.

How to measure the lens height?

The lens height is the distance between the top of the frame and the lowest point of the lens. The number depends on the frame style, and it can be crucial when you want to figure out measurements for bifocals or any other progressive lens . In the end, you will only have to worry about lens height if you want any progressive lens. Ensure that the bottom of your frames does not rub against your cheeks.

Another easy measurement you must consider is the frame width. This is the distance between the frame ends, including hinges. This measurement will be quite handy, it will help you know if the frames are too wide or too narrow. Another way to measure frame width is measuring pupillary distance. This number can help if you are looking for progressive lenses, and it will save you from eye strain.

Once you understand all the measurements listed above, then you will find the perfect fit when online shopping for eyeglasses . Finding the right eyewear can speak volumes about your personality. Showcase your fun and practical side by choosing eyeglasses that have stylish frames and functional lenses . You can always refer to a frame size guide to know whether the spectacle is available in your size or not. At Optica , we have a curated collection of trendy eyeglasses and sunglasses. Each pair comes with an eyeglass size char t that will help you find a comfortable fit. Now that you have your measurements, head on over to Optica’s online store to find the impeccable eyeglass for you!

On the prowl for your next pair?
The search starts here!

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right fit

There are several key factors to consider when it comes to finding a frame that fits: comfort, size, face shape, personal style and so much more!

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A style all your

From understated to dramatic, our style guide helps you find the right frame shape to match with your gorgeous features.

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Your prescription,
your way

Making sense of your prescription isn’t always easy. We’re here to help you understand every number and acronym on that piece of paper.

Visual Fit Guide

How to measure your face for glasses


The definition of a frame that fits

Glasses that fit well should sit snugly on your nose, comfortably on your temples, fit well behind your ears and never feel uncomfortable. Our optical team has come up with an easy-to-follow sizing guide to help you snag that perfect fit.

  1. Frames should follow your brow line
  2. Your pupil should be centred horizontally in each lens
  3. The bottom half of the lenses shouldn’t sit at the top of your cheeks
  4. Choose a colour of frame that complements your complexion and eye colour


How to measure your face for glasses

Find your BonLook size.

Calculate your frame width in mm from one end piece to the other.

[input_size] is closest to our [size]

This may differ from frame shape to frame shape.


How to measure your face for glasses

Measurement guide

Sizing made easy

Our size chart in four steps:

  1. With a ruler, measure the width of your face from temple to temple
  2. Record the number in mm
  3. Consult the adjoining chart to find the size range that fits you
  4. With those numbers in mind, choose a frame you love among our various styles

Style 101

What we mean when we say style

Style isn’t a fixed thing — it’s fluid, evolving just as you do. While glasses get a reputation for being a style to commit to, we beg to differ. Just like any accessory in your wardrobe, glasses are a part of your changing style: switch things up along with your mood, outfit, attitude, or lifestyle. Then strut your stuff.