How to size glasses to fit your face
A try-on only looks right when the frames are the right size. The easy way: paste a link to the glasses and Mirra reads the size for you. If a store blocks us, upload a front-facing photo of the glasses and enter the frame measurements. Here is what those numbers mean.
The three numbers on your frames
Most glasses have three measurements printed inside one temple arm, in millimetres — something like 52▫18▫145:
- Lens width (e.g. 52) — across one lens at its widest point.
- Bridge (e.g. 18) — the gap that sits over your nose.
- Temple (e.g. 145) — the length of the arm that reaches your ear.
How they fit your face
The total frame width (roughly lens × 2 + bridge, plus the rims) should be close to your own temple-to-temple face width. Too wide and the frames slide and overhang; too narrow and they pinch. That is exactly what Mirra shows you at true scale.
Getting a real fit in Mirra
When a frame publishes its width, Mirra scales it to those real millimetres against your face. Scale starts as an estimate from your eyes; enter your PD (pupillary distance) to calibrate it to exact true scale — it re-sizes every frame.