How to Read Eyeglass Frame Sizes

Read the three numbers

A marking such as 52 □ 18–145 usually gives the width of one lens opening, the bridge distance and the temple length, in millimetres. This is an illustrative example, not the specification of an EYVRON model.

These numbers do not describe the entire frame. Lens height, overall front width, bridge shape and temple geometry also influence fit. Two frames with the same three numbers can feel different.

Measure a sample consistently

1. Lens width: measure the widest horizontal part of one lens opening; record the method used.
2. Bridge: record the marked bridge size and assess how the bridge or nose pads actually sit.
3. Temple: confirm the stated arm length and inspect the position of the bend.
4. Front width and lens height: request both separately. Do not calculate the outside frame width simply by adding the marked sizes.
5. Weight: record whether lenses are fitted and what type they are. Compare samples on the same basis.

Ask for a dimensioned drawing if tolerances matter. Agree the measurement points and acceptable variation before sample approval.

Apply this to EVR-001

EVR-001 is presented in Crystal Smoke Grey acetate with a rounded rectangular silhouette. Its measured size, weight and hinge specification have not yet been published. Request a specification sheet and measured sample before making a fit or purchasing decision.

Your sample record

Record observations on several intended wearers. An optical professional should assess individual fit and prescription suitability.