size guide

HEADSIZE CENTIMETER  INCHES NUMERIC SIZE (INT.)
XS & YOUTH 55 21 5/8 6 7/8
OS - ONE SIZE 56 - 61 22 - 23 7/8 7 - 7 5/8
S / M 57 22 3/8 7 1/8
L / XL
59
23 1/8
7 3/8