circumference 21"/21.5" 22"/22.5" 23"/23.5" 24"
front to nape 13.5"/14" 14"/14.5" 15" 15"
ear to ear across forehead 11.5"/12" 12"/12.5" 12.5"/13" 13"
ear to ear over top 12" 12.5" 13" 13"
temple to temple round back 14" 14.5" 15"/15.5" 16"
nape of neck 4.5"/5" 5.5" 6" 6"