How to read the numbers on your frame
Three small numbers tell you most of what you need to know about fit.
Look on the inside of a temple, the arm of the frame, or behind the bridge. You will find a model code, a colour code and three numbers, such as 52-18-145. All three are in millimetres.
What the numbers mean
- Lens width (52): the width of one lens at its widest point.
- Bridge (18): the space between the two lenses, where the frame sits on your nose.
- Temple (145): the length of the arm, from the hinge to the tip behind your ear.
Some brands print a small square between the first two numbers. It means the same thing as the dash.
Use a pair you already own
- Find a pair that fits you well and read its numbers.
- Compare them with the frame you want. A difference of 1 or 2 millimetres in lens width or bridge usually feels about the same.
- Check the temple length last. It affects comfort behind the ear more than the look of the frame.
How a good fit feels
- The frame is about as wide as your face, and your eyes sit near the centre of each lens.
- The bridge rests on your nose without pinching or sliding.
- The temples reach your ears and hold the frame without pressing on your head.
Ready to look? Shop all eyewear, or read about measuring your pupillary distance if you plan to add lenses.