Head Circumference to Hat Size Converter
Enter your head measurement to find your perfect hat size across different sizing systems.
| Head Circumference (inches) | Head Circumference (cm) | US Size | UK Size | International Size |
|---|---|---|---|---|
| 21.25 | 54.0 | 6 3/4 | 6 5/8 | S |
| 21.75 | 55.2 | 6 7/8 | 6 3/4 | S |
| 22.00 | 55.9 | 7 | 6 7/8 | M |
| 22.50 | 57.2 | 7 1/8 | 7 | M |
| 22.75 | 57.8 | 7 1/4 | 7 1/8 | L |
| 23.25 | 59.1 | 7 3/8 | 7 1/4 | L |
| 23.50 | 59.7 | 7 1/2 | 7 3/8 | XL |
| 24.00 | 61.0 | 7 5/8 | 7 1/2 | XL |
| 24.50 | 62.2 | 7 3/4 | 7 5/8 | XXL |
| 25.00 | 63.5 | 7 7/8 | 7 3/4 | XXL |