Fitted hats, caps and beanies use head circumference. Get that one number and the rest is a lookup.
How to measure your head
- Use a soft tape measure. If you only have a ruler, use a piece of string and measure it afterwards.
- Wrap it around your head, about 1 cm (half an inch) above your eyebrows and ears, around the widest part.
- Keep the tape level and snug, but not tight.
- Read the measurement in cm or inches, and repeat to confirm.
Hat size chart
Approximate values. Brands may differ by a small amount.
| Head (cm) | Head (in) | US hat size | Label |
|---|---|---|---|
| 55 | 21⅝ | 6⅞ | S |
| 56 | 22 | 7 | S/M |
| 57 | 22⅜ | 7⅛ | M |
| 58 | 22⅞ | 7¼ | M/L |
| 59 | 23¼ | 7⅜ | L |
| 60 | 23⅝ | 7½ | XL |
Between sizes?
If you are between two sizes, choose the larger. You can add a hat band or sizing tape, but you cannot stretch a hat that is too small.
Caps and beanies
- Adjustable caps use a strap or snap, and one size usually fits most heads.
- Fitted caps use the numbered sizes above, so the chart matters.
- Beanies stretch, so they are usually one size.
Looking for another size converter? Try the size converter or our ring size chart.
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