Before you open another tab of frames, take off the glasses you wear most. If they fit well, they can give you a more useful reference than a small, medium or large label. You do not need to find exactly the same frame; start by checking what already works.
Read the numbers inside the arm, then compare the full frame width separately. The bridge, temple length and lens height matter too. Keep your old pair and a millimeter ruler beside you while you look at the product details.
Read the numbers inside the arm
Look along the inside of either arm, also called the temple. You may see three numbers like the example below. They usually mean lens width, bridge width and temple length, in millimeters.
- Lens width is the horizontal measurement of one lens.
- Bridge width is the space between the lenses.
- Temple length runs from the hinge to the tip of the arm.
These are frame measurements, not your prescription. They are useful starting points, but those three numbers do not describe the whole frame.
Check the full frame width, too
A frame can have familiar lens measurements and still be wider than you expect. The rims and outer corners also take up space, so look for the separate frame-width measurement on the product page. Do not calculate it by simply adding two lens widths and the bridge.
Use a millimeter ruler to measure straight across the front of your old frame. Match the endpoints in the size diagram you are comparing with: some brands measure to the outer edges, while others use the hinges.
For the measurement definitions and diagrams, see the ELOOKUS frame-size guide.
Compare the shape, not just the numbers
Lens height changes how much of the area below your eyes the frame covers. Cora is rectangular, with a listed lens height of 33.9 mm. Camille has a rounded shape and a listed lens height of 40.8 mm.
Look at the bridge in the front and angled photos as well. Two frames with similar bridge widths can have different nose-contact shapes. If your old pair has adjustable nose pads and the new one does not, matching the bridge number alone will not recreate the fit.
The photos show shape and color. They are not displayed at the same physical scale, so do not use their image sizes to compare the frames.
Cora and Camille: the measurements side by side
Camille lists a full frame width of 140 mm; Cora lists 155.4 mm. That difference is worth checking against your current pair, even if you like both styles. Compare the other measurements alongside it rather than choosing by one number alone.
| Measurement | Cora | Camille |
|---|---|---|
| Full frame width | 155.4 mm | 140 mm |
| Lens width | 52.5 mm | 46 mm |
| Lens height | 33.9 mm | 40.8 mm |
| Bridge width | 23.5 mm | 23 mm |
| Temple length | 142 mm | 145 mm |
Open Product Details on each product page to check the current dimensions and view the front, angled and detail photos.
Use your old pair as a reference, not a rule
If your current glasses pinch, slip or sit unevenly, copying their measurements may copy the problem. Note what you want to change instead of treating that pair as your ideal size.
Before ordering, compare the full width, bridge, temple length and lens height together. Use Try On to explore the look, and the measurements and product photos to check the details. A virtual preview cannot confirm the physical fit.
Keep your current pair beside you as you browse ELOOKUS eyeglasses.
Product dimensions checked against ELOOKUS product details on 25 October 2026. All product photographs are ELOOKUS images; measurement drawings are illustrative.