Glasses Size Chart By Age (Sunglasses Sizes Guide)

glasses size chart

When it comes to the power of your glass, we all have prescriptions about what the power of the glass should be. But the problem is often with the measurements of the glass. 

We all have different face structures and hence there’s a variety of sizes when it comes to sunglasses. We don’t give a thought about this while buying and end up regretting when the sunglasses sizing are not perfect. Starting from kids’ sunglasses to adults, sunglasses should be picked wisely to get the right size. 

To know in detail about different sizes of sunglasses, glasses size chart, and to understand what would be the best option for you, stay tuned. 

Glasses size chart by age 

Glasses size chart by age 

Eyeglass measurement size mostly depends on age. As we all know, a toddler can’t wear a glass that was made for an adult. So, according to age, there are differences in the size of the glasses. 

First I have a table for you with different eyeglass frames size for kids according to age. 

Kids’ Age (Years)Glass Size
0 – 135 to 37mm
1 – 2.537 to 38mm
2.5 – 440 – 42mm
4 – 743 – 45mm
7 – 1045 – 47mm
10 – 1647 – 52mm

And for adults, the prescription eyeglasses sizes are pretty much the same. Rather the size depends on different factors. Let’s look at those factors. 

Sunglass Size chart 

Sunglass Size chart 

Apart from age, various factors should be taken into consideration while choosing the perfect glasses for your eye. For example, temple length, bridge width, lens width, etc. these terms might sound new to you so we will discuss in brief about these a bit. 

Sunglass Size chart 
  • Temple: Most sunglasses or eyeglasses have measurements written on the left temple of the glass. Temple is the piece placed behind your ears. The measurement given on the temple usually consists of three numbers, and among them, the third number represents your frame’s temple length. The number will be something like this, 48-20-140
  • Lens: The first number represents the width of the lens. Usually, the diameter of the lens is called the width of the lens. It’s usually measured depending on the distance from the bridge. 
  • Bridge: Bridge width is usually the 2nd number written on the left temple. Usually, bridge width varies from 12 to 26 mm. Bridge width is the distance between two lenses. 

From the aforementioned information, we understand that the glass size chart usually depends on these fields. Now let’s look at the glass size chart. 

Face Size (temple to temple)Suitable sunglass    
Below 115mm or Below 4.5”Small
115mm or 4.5”Small
121mm or 4.75”Medium
127mm or 5”Medium
130mm or 5.125Medium
135mm or 5.25”Medium
140mm or 5.5”Medium
146mm or 5.75”Medium
152mm or 6”Large
Above 152mm or Above 6”Large

See Also:

What size sunglasses do I need? 

There are plenty of options when it comes to sunglasses. And there are various brands available as well. I can give you size charts but it’s best if tried in person. And I have already mentioned a size chart which you can follow. 

When you try sunglasses in person, you get the best idea if it fits perfectly in your face. And as long as sunglasses fit you perfectly, that’s the right size for you. The perfect size would be, if the sunglasses offer the following. 

  • A perfect-sized sunglass will contain a bridge design and position swiftly on top of your nose. 
  • The width of temples must be similar to the width of the shape of your face. 
  • The upper part of sunglasses should never cross your eyebrows. 
  • Lastly, the lower part should not put pressure on your cheek while you wear the glasses. A perfect-sized glass will never cause itching or irritation to your skin. 

Overall, you need sunglasses that can fulfill all the aforementioned qualities. 

How to measure for sunglasses? 

You need to measure your face in order to figure out which glass will fit your face perfectly.  You need to measure cheekbone to cheekbone, jawline, face length, forehead width to calculate what size of glass you need. Let’s look at how you can do these step by step. 

  1. Measure from one cheekbone to another: 

You can do this by using a ruler or measuring tape. This measurement is done so that the temples fight perfectly. You need to place one end of the tape at the very start of your cheekbone and stretch it to the same point on the other side of the face. Then note down the number. 

  1. Measuring jawline 

By placing the end of the measuring tape below your ears right where the jawbone begins, you can start the procedure. Then stretch the tape to the other end of the jawbone, taking it around the bottom of your face. Write down the number you get on the tape. 

  1. Measure face length 

Right from the starting of your hairline to the very bottom of your chin, place the measuring tape and write down the number. This comes in handy while determining the perfect lens height according to your face. 

  1. Measure your forehead width 

Lastly, you need to measure your forehead, the distance between both sides’ hairline is the length of your forehead. Write down the number you get with the other numbers you have noted before. 

  1. Now determine your face shape using the numbers

All the numbers you have noted will give you an idea of what face type you have. And based on that, you can get the perfect sunglass frame for you. And along with making sure it fits, be mindful about choosing a frame that compliments your style as well. 

 How to determine glasses frame size?

Though it’s best to find the right-sized frame in person, it’s not always possible, right?  So we often have to order it online. In that case, it’s a bit tough to determine the glasses’ frame sizes perfectly. But I have one hack for you. 

Stand in front of any mirror holding a ruler in your hand and hold it straight so it’s in line with your face and temple. Then measure the approximate distance between temples. If the number is in any unit but millimeters, convert it to mm.  

After measuring your face, determine what’s the frame width you want. That would be the summation of three things. Width of two lenses and the length of the bridge. And there you go, the number you got should be your glasses frame size. It might vary slightly by one or two mm. 

Frequently Asked Questions 

What does 52mm mean in glasses?

52 mm in glasses means that the width of the lens is 52mm. 52mm lenses are the smallest kind of lens out there.

How do I know my glasses Size?

Depending on eye size, what kind of lens you want, temple length, etc. you can determine your glass size. 

How do I know if glasses are too big?

If your glasses slip off your nose or keep falling, that’s a clear indication that your glasses are too big.

How to know do my glasses fit or not?

A rule of thumb is if the glasses touch your nose and both ends of your ears, it’s pretty well fit.

Where should your glasses sit on your face?

They should be horizontally leveled and aligned to your eyes. Also, they should be slightly tilted towards the forward direction.


We often get baffled when it comes to choosing the right glass size. But I hope this article will give you an A to Z idea about the glasses size chart and you won’t ever have to struggle with glasses. It’s time you said goodbye to the irritation of misfitting glasses and welcome and style and aesthetics of glasses that fit you perfectly.

See Also:

  1. Thinnest Lenses for High Prescription
  2. 5 High Index Lenses Disadvantages
  3. Difference between Low bridge fit vs Standard fit (High vs low nose bridge explained)
  4. Types Of Glasses For Oval Face (How to choose the right glasses for you a deep analysis)
  5. How Should Glasses Fit Properly (10 pro tips)
  6. How long are glasses prescriptions valid? (Expiration Details You Need to Know)
  7. Prescription Glasses vs Transition Glasses: Know Before You Purchase One
  8. Glasses Prescription Explained (9 Things you need to know eye prescription)
  9. How to adjust to new glasses?
  10. How often should you get new glasses?

We will be happy to hear your thoughts

Leave a reply

Glasses Advice
Enable registration in settings - general