A Passion For Eyewear

Glasses Frame Size – The Eye Spy Guide


Eyewear comes in a variety of shapes and sizes, so it’s important to know what fits and what doesn’t; wearing the wrong size, much like clothes, can be uncomfortable and unflattering. Go too big and they’ll make your head look too small, go too small and you’re head will appear bigger, it’s tricky to find the perfect pair. But don’t worry, we’ve put together 3 methods to help you choose the size that’s just right. It’s like Goldilocks, except there’s no chance you’ll encounter any bears (unless you happen to live in a remote forest or mythical wood).

Method 1

Glasses Frame Size

Glasses Frame Size

The easiest way to determine your frame size is to look at your current pair of glasses (this is assuming that you have glasses to hand of course, if you don’t, just go straight to method 3). On either temple/arm there will be different pieces of information like the manufacturers name or the frame code. One set of numbers will refer to sizing.

The information on the left is the brand name and model number. After this we see TV/DVP. Then we have 3 numbers:

53 – This is the width of the lens

20 – This is the bridge length

145 – This is the temple/arm length measurement.

If the glasses you currently own are a nice fit and suit you, you can use these numbers to browse frames at SmartBuyGlasses and pick a size that is similar to your current frames. You’ll see when picking your size that we sometimes use four numbers, the additional number is the lens height. In this case, the order will be: Lens Width–Bridge Width–Arm Length–Lens Height.

Method 2

How to Measure Eyeglass Frame Size

If the information on your glasses has worn away, you can figure out the sizes by measuring them yourself. WARNING: You will need a calculator or someone who is better at maths than you.

Eyeglasses Frame Size

You will need to measure the following:

Lens Size – Measure how wide the lens is at the widest point

Lens Height – Measure the depth of the lens.

Bridge Size – Measure the length of the bridge at the point where the lenses are closest.

Temple/arm Length – Measure the length of the temple/arm including the bend.

Front Width – The front width is two times Lens Width plus the Bridge Width. e.g., Lens Width=47, Bridge Width=16, Total width=110 ((47×2) +16).


Method 3

Measure your own Frame Size

Measure Frame Size

  • Look into a mirror and line a ruler up to your face so that you can measure from temple to temple (to make the results really accurate and make yourself luck super cool, put pencils in your ears to ensure you are level)
  • Measure the distance between your left and right temples in millimetres.
  • Write down the results
  • Maybe take the pencils out of your ears.

When buying glasses, choosing a style that is +/- 3mm won’t make too much of a difference.



Fit information

It’s important to follow some general rules to ensure that the frames that you pick will both be comfortable and flattering:

  • The top of the frame shouldn’t be higher than your eyebrows
  • The bottom of the frames shouldn’t rest on your cheeks, even when smiling. If they do then they will cause irritation.
  • The frames should not be wider than your face
  • In general, it’s best to choose frames that compliment your face shape. Large glasses may not flatter small faces and vice versa.

That’s all folks. If you’d like any help or have any questions, leave a comment in the box below. Head over to the SmartBuyGlasses Designer Prescription Glasses section to see our full range of awesome glasses.

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