Choosing the perfect pair of glasses frames depends on several factors like your face shape, prescription power, lifestyle and style preferences. Understanding which frame size is right for you is one of the most crucial factors as it ensures that your glasses offer a snug fit for you to wear them comfortably all day long. Your glasses shouldn’t be too tight or too loose – just the right fit to sit impeccably on your face. Glasses sizing is easy to master – you must know what the three different figures (usually in the format xx-yy-zz) on a frame mean. So, let’s learn about these numbers and more.
What does the set of numbers on my glasses frame mean?
All glasses are stamped with three numbers on the inside of the frame, usually on the inner side of one of the temples (the long, slender pieces that extend from the front of the frame and rest on and behind your ears for a stable and comfortable fit). These numbers are the lens width, bridge size and temple length respectively, measured in millimetres (mm) as a standard practice.
How to decide which frame size is right for me?
Let’s say, the set of three numbers stamped on your glasses is 55-14-145. Here’s what all these numbers would imply for you:
1. Lens Width
The first number on your frame is the lens width or eye size that refers to the frame openings where lenses are fitted. This value is 44mm to 62mm for most glasses frames. In this case, this opening on each side is 55mm wide.
2. Bridge Size
Bridge size is the second number in the set, referring to the distance between the lenses. The bridge of the frame rests on your nose and measures 14mm to 24mm for most prescription glasses. In this case, the bridge is 14mm wide.
3. Temple Length
Last on the set is the temple length – measurement of the arms of the frame. It is measured from the frame’s hinge to the temple’s tip and ranges from 120mm to 150mm for most glasses. In this case, each temple of the frame is 145mm long.
Some other considerations
- In addition to these numbers, you might find some other letters and numbers on your frame. They are usually a part of the frame’s model name and colour code.
- It is not essential that 2 pairs of glasses with the same measurements will offer the exact same fit. This is why, it’s always a great idea to consider the glasses shape and style too.
- Every face shape is different, and it is imperative that you consider your face shape to order a pair of best-looking glasses. For instance, if you have round or oval face shape, angular glasses styles like square and rectangle will help enhance your facial features. Even if you are shopping online, remember to try the glasses virtually for a confident shopping experience.







