Size Guide | Olney
ENGLISH SIZE | AMERICAN SIZE | HEAD CIRCUMFERENCE (INCHES) | HEAD CIRCUMFERENCE (CM) | ||
A | 6 | 19 1/4 | 49 | ||
B | 6 1/8 | 19 5/6 | 50 | ||
C | 6 1/4 | 20 1/8 | 51 | ||
D | 6 3/8 | 20 1/2 | 52 | ||
E | 6 1/2 | 20 7/8 | 53 | ||
F | 6 5/8 | 6 3/4 | 21 1/4 | 54 | |
G | 6 3/4 | 6 7/8 | 21 5/8 | 55 | Small |
H | 6 7/8 | 7 | 22 | 56 | |
I | 7 | 7 1/8 | 22 1/2 | 57 | Medium |
J | 7 1/8 | 7 1/4 | 22 7/8 | 58 | |
K | 7 1/4 | 7 3/8 | 23 1/4 | 59 | Large |
L | 7 3/8 | 7 1/2 | 23 5/8 | 60 | |
M | 7 1/2 | 7 5/8 | 24 | 61 | X-Large |
N | 7 5/8 | 7 3/4 | 24 1/2 | 62 | |
O | 7 3/4 | 7 7/8 | 24 7/8 | 63 | |
P | 7 7/8 | 25 1/4 | 64 |