Hat sizing cross reference
U.S. |
English |
Circ. Inches |
Circ. CM |
6-3/4 |
6-5/8 |
21-1/8 |
54 |
6-7/8 |
6-3/4 |
21-1/2 |
55 |
7 |
6-7/8 |
21-7/8 |
56 |
7-1/8 |
7 |
22-1/4 |
57 |
7-1/4 |
7-1/8 |
22-5/8 |
58 |
7-3/8 |
7-1/4 |
23 |
59 |
7-1/2 |
7-3/8 |
23-1/2 |
60 |
7-5/8 |
7-1/2 |
23-7/8 |
61 |
7-3/4 |
7-5/8 |
24-1/4 |
62 |
7-7/8 |
7-3/4 |
24-5/8 |
63 |
8 |
7-7/8 |
25 |
64 |