If you are buying a new pair of glasses online, you will need to know the correct frame size to order to make sure the frame will fit your face.
If you already have a pair of glasses, you can use the measurements on them as a guide.
We will explain what they mean, so you can better understand how a pair of eyeglasses are made, and what all the numbers mean.
The Numbers on Your Glasses
If you are a glasses wearer, you may have noticed some numbers on the arms or on the side of your frame, or sometimes on the bridge.
These numbers usually include the frame model, colour and size (MM).