"Everybody has two faces"

Size Guide

Size Guide Table

XS S M L XL
a 18 1/2 19 3/4 20 3/4 22 23 1/2 inch
47 50 53 56 60 cm
b 26 3/4 27 1/2 28 1/4 29 1/4 30 inch
68 70 72 74 74 cm