You’re one click away from a beautiful hat.

SIZE CM INCHES US UK
S 55 56 21 1/2 22 6 7/8 7 6 3/4 6 7/8
M 57 58 22 1/4 22 5/8 7 1/8 7 1/4 7  7 1/8
L 59 23 7 3/8 7 1/4

Define your size by circling your head with a tape mesure, placing it above your ear and across your mid-forehead.
Do not circle too tighly. If you fall in between sizes, choose the next largest size.