How To Fit Your Glasses Perfectly - Picking The Perfect Eyewear


Getting new eyeglasses is more than picking a cute shape or a vibrant color, since they should always fit our faces comfortably. When most of us are looking for new glasses we rarely pay attention to the specific measures that make them perfect for our faces. And for a good reason too: it’s not widespread information.

If you truly want to pick the perfect eyewear, and make the most out of your new glasses, while feeling comfy and confident in them, read our complete guide on how to fit your glasses perfectly.

The Fit Width

Fit number

The first thing you need to do is checking the numbers that appear inside the temple arm of your glasses. The first number is the lens width, the second corresponds to the bridge or nose width, and the third is the temple or arm length. For example: 50mm - 20mm - 146mm.

Using this simple formula, you can find out your fit number:

Fit Number = Lens Width (Right Eye) + Bridge + Lens Width (Left Eye)

If you simply can’t find these numbers (it’s possible that they might have rubbed off over time!), then just place a ruler on top of the frame to measure the entire inside width in millimeters to discover your glasses’ Fit Number.

Your fit number corresponds to a fitting width for eyeglasses:

Fit Number Fit Width
117 mm or less Narrow
118 mm to 124 mm Medium
125 mm or more Wide

This means, that if you have 125 mm fit number, you should pick a pair of glasses with a wide frame.

Important considerations

  • The glasses should not hang off the side of your face. Equally, we should not be able to see the sides of the temples.
  • The glasses’ temples should be adjusted to fit around your ears. If they slide down your nose, the temples need to be bent to keep them in place.
  • Your eyebrows should be visible above the frames.
  • Each eyeball should be directly in the center of the lens.
  • The overall frame should be located roughly in the middle of your face.
  • Your eyes should fill the top half of the lens. Similarly, the bottom of the eye should touch the vertical midpoint of the lens.

Frame styles

Frame styles can be categorized into one of three styles

  • Fully-rimmed frames: The frame material entirely encircles the lenses. These are compatible with any prescription, especially for higher prescriptions.
  • Semi-rimless frames: The frame material partially encircles the lenses. These are most appropriate for mild to moderate prescriptions.
  • Rimless frames: Only the temples and bridge exist in this type of frames. These types of eyeglasses are not recommended for higher prescriptions or single vision reading glasses.

Frame type

The perfect frame type depends on your face shape

  • Oval faces have balanced features with a slightly, narrower forehead and jaw. The perfect fit for this type of faces are: cat eye, rectangle, square and wayfarer shaped frames.
  • Square faces have prominent jawlines, with the same width as their foreheads. Try oval, rounded, and wayfarer frames.
  • Heart-shaped faces have broad foreheads, along with a narrow jaw and chin. Cat eye shaped glasses, rectangle and wayfarers frames are the best for you.
  • Round faces have full cheeks, and their foreheads and jaws are of the same width. We can recommend you frames with the following shapes: cat eye, rectangle, square, and wayfarer.