Every frame carries three measurements in millimetres, printed in small type on the
inside of one temple arm. They read like this:
63□15 145
- 63
- Lens width. The width of a single lens at its widest point.
- 15
- Bridge. The gap between the two lenses, the part that sits on your nose.
- 145
- Temple length. The arm that runs from the hinge to behind your ear.
Finding them on a pair you own
Open the arms of the glasses you wear now and turn the left one so the inside faces
you. The three numbers run along it, usually near the hinge, separated by a small
square or by dashes. The model code and the colour code often sit beside them. If the
left arm is bare, check the right arm and the inside of the bridge.
Match those numbers against the lens width listed in the specification on this page
and you will know how this frame compares to one you already like the fit of. A
difference of one or two millimetres is not something you will feel. Five or more is.
Or let an optician read it
Photograph the inside of your current temple arm and send it to us on WhatsApp. Our
opticians will read the size off the picture and tell you whether the frame you are
looking at will sit correctly on your face, before you order.
Send a photo on WhatsApp
Read the full guide to frame numbers