How To Measure Frame Size

Finding the right frame size is an important part of buying eyewear online. Luckily, it's also super simple! Below is a helpful guide to understanding glasses measurements and sizes when looking for your next pair of eyeglasses or sunglasses.

Where To Find Your Frame Measurements
The measurements are typically located inside the temple of your spectacles. This part is sometimes referred to as the "arm" of your spectacles. Typically, the frame measurements are displayed as three integers with dashes between them, such as 48-19-140 or 52 [] 18 135. These numbers, which are written on the inside of one arm, can be divided by dashes, spaces, or a tiny square. The frame model, color, brand, or manufacturer may be indicated by additional letters or numbers on the arm. The measures of the glasses are typically straightforward to identify because they are all given in millimeters, have consistent ranges, and follow the same order.

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Tip diagram

Lens Width

The first measurement in the series of glasses is always the lens width, sometimes referred to as "eye size." Each lens's width is indicated in millimeters. This measurement excludes the surrounding frame and only takes into consideration the width of the clear lens through which you are looking.

Usually, the lens width/eye size falls between 40 and 60 mm.

Tip diagram

Bridge Width

The first measurement in the series of glasses is always the lens width, sometimes referred to as "eye size." Each lens's width is indicated in millimeters. This measurement excludes the surrounding frame and only takes into consideration the width of the clear lens through which you are looking.

Usually, the lens width/eye size falls between 40 and 60 mm.

How Glasses Should Fit

When your glasses are positioned in front of your eyes, your pupils should be looking out of the center of each lens. Both horizontally and vertically, this rule is applicable. What to look for is as follows:

Customer Size Ladies Mens
XS <48 <50
S 48-50 50-51
M 51-53 52-54
L 54-56 55-57
XL >56 >57

How Glasses Should Fit

Tip diagram

Bridge Width

The first measurement in the series of glasses is always the lens width, sometimes referred to as "eye size." Each lens's width is indicated in millimeters. This measurement excludes the surrounding frame and only takes into consideration the width of the clear lens through which you are looking.

Usually, the lens width/eye size falls between 40 and 60 mm.

Find The Perfect Frame Size For You!

Understanding your glasses measurements comes in handy when you are ready to buy a new pair. If you already own some old, well-loved frames, their measurements can be a smart place to begin your search. That said, measurements are not the only thing that matters, and they should not fully control your style choices. Think of them as helpful guidelines while you look for frames your heart truly desires. Once you know how to read frame measurements, take a moment to explore Mafami’s handcrafted eyeglasses and sunglasses for both men and women.

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