... , light brown, medium brown or dark brown colorCap ItemSmall(a: 21.5" , b: 13.5" , c: 11" , d: 12" , e: 14" , f ... : 5" )Medium(a: 22.5" , b: 14.5" , c: 11.5" , d: 12.5" , e ... : 14.5" , f: 5.5" )Large(a: 23.5" , b: 15.5" , c: 12" , d: 13.5" , e: 15 ... .5" , f: 6" )a: Circumference b: Front to nape c: Ear to ear across forehead d ...