How To Find Your Glasses Size

Not all online shopping is quick and easy. We understand that shopping for designer eyewear online can be a difficult task because it’s more of a thing you do in person, but online stores like Vizio Optic provide a far larger selection than brick-and-mortar shops and give you much more to choose from. Thus, we aim to make your experience as positive as possible.

When shopping online for eyewear, one of the most important things you must know is your correct size! If you’ve worn glasses before, it’s very easy to find this information. Just grab an old frame and look at one of the inner arms for a string of numbers that look similar to this: 54-13-135. Find it? Great! Don’t know what it means? That’s what we’re here for!

The first number is the horizontal measurement of one lens in millimeters. Compare this and the other numbers to frames you find online to make sure you are within the same size range. The second number is the bridge – the strip that sits over your nose. This number doesn’t always have to be in the same range, as some can be narrow and some can be wide, but should be relatively close. The last number is the length of the temple, or the arm that runs from the hinge to the end of the part that sits on your ear.

If you do not have an old pair of designer glasses to compare, here is a guide for you to quickly reference while shopping:

Extra Small: Lenses that measure 46mm and smaller. (This size is typically found in kids glasses or those with round lenses.)

Small: 47mm to 50mm lenses

Medium: 51mm to 53mm lenses

Large: 54mm to 56mm lenses

Extra Large: 57mm lenses and larger

We consider a temple length of 120mm to be small, 130mm to be medium, and 140mm as large. You can estimate your correct size given these ranges.

One thing to keep in mind is the shape of your frame. If you are opting for an oversized look, the lens size if obviously going to be a bit skewed from your previous frames. For round glasses, the lens measurement may be a bit smaller.

If you have any questions or need additional assistance in choosing a frame, please contact us at or 866-411-9428 and we will be happy to help you.

If the frame your order is an incorrect fit, you may return or exchange for a new pair. We offer free returns on frames for a full refund. Please see our return policy for more details.

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