Do these numbers look familiar? 47 | 15 | 125 If you’ve ever tried to purchase glasses online, you may have been left wondering what those numbers mean. We’ll help you make sense of them.

Typically, most eyewear manufacturers will print these numbers on the inside of one of the temples. This image shows you what these numbers might look like on a frame.

Frame measurements

But, what does each set of numbers represent?

Frame size is determined by the three key measurements, always in millimetres, found on the inside of the frame, typically on the temple. The three measurements are: lens width (from 31-60mm), bridge width (from 12-31mm), and temple length (from 115-155mm).

What’s next?

Now that you understand frame measurements, you might be wondering, what’s next, how do I purchase my glasses online? Read our helpful articles to learn more.