Hats are a staple in the crochet world but they can be a bit tricky to size just right.

I can help!

I’ve created a measurement range of the most popular hat sizes (from newborn up to adult), that you can use as a guide to make measuring easy.

There are also some tips to help you measure for the best fit, and always crochet the right size.

And in case that’s not enough, I’ve created a free calculator tool that you can use when you’re crocheting hats so that you can measure as you go for the best fit.

Finally, I’ve listed some crochet hat patterns you can try to test out all these new skills.

Ready to crochet hats that fit?

Estimated reading time: 4 minutes

What Size Hat To Make: Easy Guide For Crochet - American Crochet Association

What to measure

There are two measurements that are important to know when crocheting a hat: circumference, height.

To measure for the circumference of a hat (around), use a fabric tape measure from the center of the forehead and wrap snugly around the head.

To measure for the height of a hat (tall), use a fabric tape measure from the crown (top) of the head, down to the center of the ear.

Size by age

Sizes by age may differ, and size should not be determined by age alone.

For example, not all newborns have a 12″ head.

And, not all adults have a 22″ head.

And, not all hat styles are the same size (more on that next).

For the best fitting hat, always measure the head first and then create a hat based on that specific size.

Sizes by style of hat

This size guide can not account for all hat styles.

Some hat styles should be fitted; that means the exact measurement of the hat fit the exact measurement of the head.

And some hat styles should be oversized; that means the exact measurement of the hat can fit the circumference of the head but be longer for a slouchy look, or the exact measurement of the hat can be wider than the circumference of the head for an oversized look.

Knowing the size of the head, and the intended style, will help you to crochet the right look and fit.

Gauge and size

When following a pattern, be sure to use the same yarn and hook size a pattern indicates so that your stitch and row gauge will be an exact match to the pattern gauge. 

For more tips about meeting size and gauge, click here:

Hat patterns to try

Give these tips a try with a few different styles of crochet hats that are free to view on our website!

Ombre Beanie Crochet Pattern

Sun Hat Crochet Pattern

Thick & Quick Crochet Hat Pattern

Double Strand Bucket Hat Crochet Pattern

Crochet Calculator: The Perfect Hat Size

Working hats from the center out in rounds can also be tricky to measure, especially since just an inch of crochet fabric can be the difference between a toddler or adult size.

But, with a simple math trick (and our crochet hat size calculator), you’ll be able to measure your work to get the perfect size hat every time.

CLICK HERE to read more and try this free tool today!


If you would also like to watch a full chat on this subject, I’ve got a video you right here:

Did you find some helpful tips for crocheting your next hat?

Click Here to start a conversation in our community!

Peace + Love + Crochet


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