Frame Sizing

Finding the right frame size is a bit like finding the perfect pair of jeans or a favorite t-shirt: once it fits, everything just feels right. Glasses sit comfortably, stay put, and look like they were made for that face. This guide turns frame sizing into a simple, even fun process, with easy tools, clear size ranges, and friendly tips to help frames land in the sweet spot of “just right” instead of “too big” or “too tight.

A Helpful Starting Tip

​​​​​​​Sizing can look a bit technical at first, but it really comes down to a few simple measurements. If an existing pair of glasses fits well, check the inside of the temple (arm) for numbers like: 50 □ 18 - 140​​

• First number = lens width

• Second = bridge width

• Third = temple arm length

Most frames list these numbers inside the temple. For many shoppers, lens width (the first number) is the easiest place to start, which is why our size ranges are based on that measurement.

Adult Frame Sizes

(based on lens width)

• X-small: less than 46 mm

• Small: 47 – 49 mm

• Medium: 50 – 53 mm

• Large: 54 – 56 mm

• X-large: 57 mm and above

​​​​​​​​​​​​Kids Frame Sizes

(based on lens width) ​​​​​

• X-small (ages 0–3): 35 – 40 mm

• Small (ages 4–6): 41 – 45 mm

• Medium (ages 7–9): 46 – 48 mm

• Large (ages 10–13): 49 – 58 mm

Sizing Exceptions & Refinements

• Bridge Width: Our system will also factor in bridge width to fine-tune sizing since a very narrow or very wide bridge can significantly affect a frame's fit. Here's how we make these refinements:

  • Narrow Bridge (15mm or less): One size smaller.

  • Wide Bridge (19mm or higher): One size larger.

• Wraparound Frames: To maintain accuracy for curved frames, sport and wrap styles use the total frame width to determine size.

Using the Frame Filter

The Frame Filter is designed to make finding a good fit simpler and more personalized. To find it, go to any frame category or the All Glasses page. It offers several ways to narrow the search:

• Find My Size

  • This features two options if you have a current pair of glasses or don't know which size you need.

  • Enter the numbers from an existing pair (usually printed inside one of the temple arms).

  • Measure your face using our scanning tool.

• Size Filter

  • The Size filter offers a quick way to see frames grouped into adult or kids size categories.

  • This keeps the browsing list focused on frames that are the most likely to fit well.

• Custom Sizing

  • For a more tailored search, the Custom option allows filtering by extra measurements, such as:

• Lens Height

  • Overall frame width

• Comfort Features

  • Comfort is just as important as style. The Comfort Features section highlights frame options that can help glasses feel better throughout the day, such as:

    • Lightweight frames

      • Flexible or spring hinges

  • Nose pads for a more adjustable fit

  • Adjustable temple arms

Extra Sizing Tips and Tricks

These tips are meant to guide, not limit. Face shapes, style preferences, and comfort needs are all different. In the end, the best frame is the one that looks good, feels good, and fits your personality.

• What a good fit looks like

  • Frame width: When the frame is roughly the same width as the face (not much wider, not much narrower), it tends to look more balanced and feel more secure. Frames that are too wide can slide around; frames that are too narrow can pinch.

  • Eye position: When the eyes line up roughly with the center of each lens, not too far toward the nose or outer edge. This usually feels more natural and looks more balanced.

  • Nose comfort: Glasses should stay in place without constant nudging and should not leave deep, sore marks after a short time. A light imprint after a full day is normal; redness or pain is a sign that a different fit, material, or bridge size/style might help.

• Matching size to prescription and style

  • Higher prescriptions: Smaller or more modest frame sizes can help keep lenses thinner and lighter. This often means less edge thickness, less “magnified” or “minified” look, and a more comfortable feel on the nose and ears.

  • More viewing area: Larger frames can offer more viewing area, especially side to side and up and down. This can feel more open and spacious, but with stronger prescriptions, it may also mean slightly heavier lenses.