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How to find your Eyeguard size

Pick the most comfortable pair of glasses you own. Lay your glasses on a flat surface with the temple arms fully extended as if you are wearing them. Measure the widest distance between the temples. For most frames, this distance will likely be measured at the ear bow of the temples, i.e. the ear bow is the point that sits right above your ear when you are wearing the glasses.

correct way to measure_2

Once you've measured the ear-bow to ear-bow distance, you can refer to the following chart to determine the Eyeguard size that fits you.


Measurement From Your Dress Glasses and determine size for:

Temple version

Strap version


Less than 120mm

Less than 120mm


121 – 130mm

121 – 130mm


131 – 135mm

131 – 135mm


Bigger than 135mm

Bigger than 135mm


If you are unsure you have measured you frame correctly, then take a picture of your eyewear frame as shown above with a ruler across the widest point.  Email us the image together with your prescription and order number.  We will help you to determine the right frame for you.  Ensure the picture is taken at an upright position like this:

take photo as below

If you do not currently own a pair of glasses, you can take a ruler and place it over your forehead as shown in the picture. You can email us the picture so that we can help you determine the correct size.

Try our frame at home for free! 

Not sure it will fit? No worries, try the Eyeguard frame at home for free with our "Home Try-On" service. We will cover all the costs up to three different frames to help you ensure that your final pick is the right one. 

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