So, you’re looking for a hat and you wonder: how do I measure my hat size? And what do those sizes on hat labels mean anyway? Don’t worry. It’s simple. 

Measure your hat size with these super easy simple steps:

Step 1: Measure Yourself

First things first, you can either use a sewing tape measure or a long string and a ruler. Having someone to help makes the process easier but you can also do it on your own.

  • The trick here is to measure exactly where the hat will sit. Place the tape or string around your head about 1/8” above the top of the ears and across the mid-forehead (usually about half an inch above the eyebrows) so that you completely circle your head. 
  • Be sure to hold the tape or string firmly but not too tightly. It’s always a good idea to allow some wiggle room. 
  • Hold your thumb or another finger against the tape measure or string where it comes around to meet the end. Check the measurement of the tape wrapped around your head and note it down.
  • If you’re using a string, keep your thumb or finger on the spot where the string wrapped around your head then lay it out flat on a table alongside a ruler/regular measuring tape to take the measurement in inches or cm. Should you fall between sizes, the general rule is to choose the next largest size.

Step 2: Calculate Your Hat Size

Most hats are sized generally as small, medium or large. However, some hats will have more specific sizes. Once you’ve measured the circumference of your head, correspond the measurement to a hat sizing chart. While many designers offer a size chart specific to their brand, here’s a general guide on hat sizes:




21 1/8–21 1/2 inches 

(54–55 cm)

Small/sizes 6 3/4 – 6 7/8

21 7/8–22 1/4 inches 

(56–57 cm)

Medium/sizes 7 - 7 1/8

22 5/8–23 inches  

(58–59 cm)

Large/sizes 7 1/4 – 7 3/8

23 1/2–23 7/8 inches  

(60–61 cm)

X Large/sizes 7 1/2 - 7 5/8

24 1/4–24 5/8 inches

(62–63 cm)

XX Large/sizes 7 3/4 - 7 7/8

25–25 3/8 inches 

(64–65 cm)

XXX Large/sizes 8 - 8+


Helpful Fitting Tips

  • Unless you’re planning on wearing your hat at a tilt, backwards or atop your head, make sure it sits comfortably at the center of your forehead slightly above the eyebrows. 
  • The hat should never obstruct your vision or sink too low as to cover your eyebrows
  • If the hat has a sweatband, make sure it doesn’t leave crease marks on your forehead or feel restrictive. The sweatband may leave a slight mark on your forehead that quickly fades, which is no cause for worry. However, you shouldn’t be feeling any pain.

Measuring your hat size may seem complicated at first, but once you know what the numbers mean, you’ll have an easy time figuring out the rest. Armed with this knowledge, you’re now ready to find that hat you’ve always wanted.


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