HAT & HEAD SIZE

USA
METRIC
INCHES
MEN'S & WOMEN'S SIZING
6 3/4
54
21 1/8"
SMALL
6 7/8
55
21 1/2"
7
56
21 7/8"
MEDIUM
7 1/8
57
22 1/4"
7 1/4
58
22 5/8"
LARGE
7 3/8
59
23"
7 1/2
60
23 1/2"
X-LARGE
7 5/8
61
23 7/8"
7 3/4
62
24 1/4"
XX-LARGE
7 7/8
63
24 7/8"
8
64
25 1/4"
USA
METRIC
INCHES
CHILDREN'S SIZING
6
48
18 7/8"
SMALL
6 1/8
49
19 1/8"
6 1/4
50
19 1/2"
MEDIUM
6 3/8
51
19 7/8"
6 1/2
52
20 1/4"
LARGE
6 5/8
53
20 3/4"