Glasses Frame Size Guide

Using the measurements of your existing glasses, you can easily find the right sized glasses for you, ensuring your new pair fit just as well. Understanding the frame measurements of your glasses is essential as this will affect how the glasses sit on your face. If your glasses don't sit properly on the face, they may slide off frequently, resulting in them not aligning correctly with the centre of your eyes. This misalignment can cause blurry vision which can then lead to discomfort and headaches as well as having to strain your eyes more.

Glasses are made to fit a generalised measurement of most people’s faces. You will find that some styles of glasses come in a smaller sized frame for smaller or slimmer faces. Our glasses come in small, medium and large sized frames with various measurements, depending on which style you choose. Our handy guide will help you find the perfect frames with the best lenses to fit your face.

Where can I find the measurements of my glasses?

If you open your glasses up, the measurements of your glasses can be found on the inside of one of the temple arms. This will be shown in three numbers.

How are glasses measurements usually written?

The measurement of your glasses is shown as three numbers which will usually look something like this:

54 - 18 -137.

What do my glasses measurements mean?

The measurements of your glasses are the dimensions of the frame, typically written in millimetres.

- The first number shows the diameter of the lenses

- The second number indicates the width of the bridge (across your nose)

- The third number shows the length of the temple/arms

Here is a short guide on how to understand these numbers.

The Lens Diameter

The first number is the thickness or width of the lens measured in millimetres. The size of your lenses is mostly determined by the design of your frame as well as your prescription.

The Bridge Width

The second number is measured from the bridge above your nose between the lenses. If the glasses are too tight, they will squeeze your nose and feel uncomfortable. If your glasses are the correct bridge size, they will sit comfortably on the face.

The Length

The third number is the length; this is the biggest number. The standard and most common length sizes are 135, 140 and 145mm. You'll know if the temple size is right for you if the arms are long enough to sit comfortably over your ears.

Issues with ill-fitting glasses

Glasses that don't fit properly will slide off of the face, look off-balance and will not be in line with your central field of vision. It is vital that you visit an optician to get your eyes tested, as they will give you the best measurements for your glasses.

With the correct measurements for your glasses, you'll be able to find a pair of glasses perfectly fitted to you. You can order your glasses online directly from Feel Good Contacts and have them sent to you within a week.