SMALL/MEDIUM: 6 3/4 - 7 1/8 (21 1/2" - 22 5/8") 3 1/4" brim Gambler crown with leather band UPF 50+ Protection on front 1/2 of brim LARGE/X-LARGE: 7 1/4 - 7 5/8 (23" - 24")