An international reference for hat sizes based on head measurements.
| Size | US / UK (Fitted) | Inches (Head) | CM (Head) |
|---|---|---|---|
| XS | 6 3/4 - 6 7/8 | 21.1 | 54 |
| S | 7 - 7 1/8 | 21.9 | 56 |
| M | 7 1/4 - 7 3/8 | 22.7 | 58 |
| L | 7 1/2 - 7 5/8 | 23.5 | 60 |
| XL | 7 3/4 - 7 7/8 | 24.3 | 62 |
| XXL | 8 - 8 1/8 | 25.1 | 64 |
To find your hat size, use a flexible measuring tape to measure the circumference of your head. Wrap it around your head where a hat would comfortably sit — typically slightly above your eyebrows and ears. Use the CM or Inches measurement from the tape to find your corresponding size in the chart above.