Hat Size Calculator
Turn your head measurement into a U.S. fitted hat size, a UK size, a metric size and S/M/L.
Result
Between sizes? Go up one. Hats can be snugged with a sizing strip but not stretched much.
U.S. fitted size
7 1/8
- UK size
- 7
- European / metric size (cm)
- 57
- Letter size
- M
How to use the Hat Size Calculator
- Head measurement: Wrap a soft tape around your head about an inch above your eyebrows and ears, where a hat sits.
- Measured in
The results update as you type, and you can copy a link that reopens the calculator with your numbers filled in.
What it tells you
- U.S. fitted size
- UK size
- European / metric size (cm)
- Letter size
Example
Starting from Head measurement: 22.5; Measured in: Inches, the calculator gives U.S. fitted size: 7 1/8.