Outdoor Research Headware Size Chart

	Small	Medium	Large	X-Large
US Hat Size	6⅞	7⅛	7⅜	7⅝
Inches	21⅝	22½	23¼	24
Centimeters	55	57	59	61

These are general guidelines only, sizes are not guaranteed. But no worries, since at SunnySports we offer our exclusive PFF Guaranty