The Numbers on your Glasses

If you're a glasses wearer you may notice some numbers on the arms or the bridge. These numbers usually include the frame model, colour code and measurements, as illustrated.

The numbers, 55 [] 18 - 145 (in millimetres) displayed in this image indicate the following:-

55 (mm) will represent the width of the lens. Usually a 2 digit number in the 40-62mm range.

will represent the width of the lens. Usually a 2 digit number in the 40-62mm range. 18 (mm) will represent the width of the bridge. Usually a 2 digit number in the 14-24mm range.

will represent the width of the bridge. Usually a 2 digit number in the 14-24mm range. 145 (mm) will represent the overall length of the arm. Usually a 3 digit number in the 110-150mm range.

Our video guide below will help you find these numbers.