Q: How do I measure my head size for a hat?

Wrap a soft tape measure around your head about 1-2 cm above your ears and eyebrows — the widest part of your head — keeping it level and snug but not tight. That measurement in cm or inches is your head circumference.

Question 1

How do I measure my head size for a hat?

Accepted Answer

Wrap a soft tape measure around your head roughly 1-2 cm above your ears and eyebrows — this is the widest, most consistent point to measure. Keep the tape level all the way around.

If you don't have a soft tape measure, wrap a string around your head at the same point, mark where it overlaps, then measure the string against a ruler.

Question 2

What's the difference between fitted and adjustable hat sizing?

Accepted Answer

Fitted hats use the precise numeric sizes shown in the chart above and have no size adjustment, so you need your exact measurement. Adjustable hats (snapback, strapback) use a single size that fits a range of head circumferences via a strap or snap closure.

Question 3

How do kids hat sizes work?

Accepted Answer

Kids hats are usually labeled by age range (e.g. 2-4 years, 5-8 years) rather than the numeric fitted scale, since children's head circumference grows quickly — always check the brand's own age-based chart for kids.

Question 4

Why do hat sizes vary between brands?

Accepted Answer

Different brands use slightly different crown shapes and internal sizing tape standards, so the same labeled size can sit differently. When possible, size based on your measured head circumference rather than a size you've worn before.

Question 5

What if my measurement falls between two sizes?

Accepted Answer

Round up to the next size for structured or fitted hats, since a slightly loose fit is more comfortable than a tight one — you can also add a sizing tape strip inside the hat to snug up a slightly large fit.

Question 6

How do I convert cm to US hat size?

Accepted Answer

Divide your head circumference in cm by roughly 8 (based on π) to estimate the US hat size, or simply match your cm measurement to the closest row in the chart above.

US	UK	EU	Head (cm)	Head (in)
6½	6½	52	52	20.5
6⅝	6⅝	53	53	20.9
6¾	6¾	54	54	21.3
6⅞	6⅞	55	55	21.7
7	7	56	56	22
7⅛	7⅛	57	57	22.4
7¼	7¼	58	58	22.8
7⅜	7⅜	59	59	23.2
7½	7½	60	60	23.6
7⅝	7⅝	61	61	24
7¾	7¾	62	62	24.4
7⅞	7⅞	63	63	24.8
8	8	64	64	25.2

Hat/Cap Size Converter

Full Size Chart

How to Measure

Frequently Asked Questions

Shoe Size Converter

Ring Size Converter

Belt Size Converter