This is a great guide to finding your hat size, where you’ll learn to take your measurement to find the perfect fit, and also convert between US, UK and French sizes.
This conversion chart is for both men and women – look here for children’s hat sizes.
Adult hat size chart – men and women
How to measure your hat size
To measure your size before you buy your hat, wrap a tape measure around your head just above your ears and at the center of the forehead. The tape should fit comfortably – not too tight. Round up to the nearest size. You can also use a piece of string, and then measure it with a normal ruler. If you’re not sure about the size – choose the larger size.
| XS-XL | Inches | Cm | US | UK | France |
|---|---|---|---|---|---|
| XXS | 19 4/8 | 50 | 6 1/4 | 6 1/8 | 1 1/2 |
| XXS | 19 7/8 | 51 | 6 3/8 | 6 1/4 | 2 |
| XXS | 20 2/8 | 52 | 6 1/2 | 6 3/8 | 2 1/2 |
| XS | 20 3/4 | 53 | 6 5/8 | 6 1/2 | 3 |
| XS | 21 1/4 | 54 | 6 3/4 | 6 5/8 | 3 1/2 |
| S | 21 5/8 | 55 | 6 7/8 | 6 3/4 | 4 |
| S | 22 | 56 | 7 | 6 7/8 | 4 1/2 |
| M | 22 1/2 | 57 | 7 1/8 | 7 | 5 |
| M | 22 3/4 | 58 | 7 1/4 | 7 1/8 | 5 1/2 |
| L | 23 1/4 | 59 | 7 3/8 | 7 1/4 | 6 |
| L | 23 5/8 | 60 | 7 1/2 | 7 3/8 | 6 1/2 |
| XL | 24 | 61 | 7 5/8 | 7 1/2 | 7 |
| XL | 24 1/2 | 62 | 7 3/4 | 7 5/8 | 7 1/2 |
| XXL | 24 3/4 | 63 | 7 7/8 | 7 3/4 | 8 |
| XXL | 25 1/4 | 64 | 8 | 7 7/8 | 8 1/2 |
Find the right hat size
Some hats, like baseball caps, may have a little bit of stretch in the fabric, so you may want to size down if you’re in between sizes. Other models, like fedoras or straw hats, may not have much give in the material, so you may want to size up.
A well-fitting hat should sit comfortably on your head without feeling too tight or too loose. It should also be secure enough to stay on your head in windy conditions, but not so tight that it leaves a mark on your forehead.
Please observe that this is only a guide to find your hat size, sizes may vary between different manufacturers.