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What size are my craft eyes?

Do you have some plastic craft eyes in a box somewhere… and you aren’t sure how to tell what size they are?

Umm… yup, me too. Don’t worry! Today, I’ll show you how easy it is to figure out what size they are!

All you need is a ruler with millimeter measurements. A craft eye is sized by its diameter in millimeters. So, to determine the size, place the ruler across the widest part of the eye.

Using a ruler to measure plastic safety eyes

You can see that this eye is a 24mm. Easy!

If you have a needle gauge and small eyes, I have an even easier way. Knitting needle measurements are determined by the diameter of the needle, so you can simply stick the eye in the gauge!

Measuring a craft eye with a needle gauge

This is an 8mm eye, and it fits fully in the 8mm slot (size 11 needle).

Here’s a look at the back view:

Note that the eye fits snugly in the hole, but does not go entirely through like a knitting needle would.

Now you can organize your craft eye stash!


  1. Ernestine Santiago SAYS...

    The saying, you learn something new every day, if not it’s a waisted day. With crochet, omgoodness. THAT WAISTED DAY, IS NONE EXISTENT.

  2. Kay Swanson Torrence SAYS...

    Thank you thank you for this I just was trying to figure out what sizes I had found in a bag of safety eyes

  3. Jessica SAYS...

    Do you put the eye in the hole so the flat part on the back of the eye is flush with the back of the gauge