Hat Size	Hat Size	Head Size (inches)	Head Size (cm)	Avg Hat Inv
XXS	6-3/8 — 6-1/2	20 — 20-1/2"	51 52	.5%
XS	6-5/8 — 6-3/4	20-3/4 — 21-3/8"	53 54	2%
S	6-7/8 — 7	21-1/2 — 22-1/8"	55 56	28%
M	7-1/8 — 7-1/4	22-1/4 — 22-7/8"	57 58	44%
L	7-3/8 — 7-1/2	23 — 23-5/8"	59 60	22%
XL	7-5/8 — 7-3/4	23-3/4 — 24-3/8"	61 62	2.5%
XXL	7-7/8 — 8	24-1/2 — 25-1/8"	63 64	1%