Head Sizing Guide To measure the head circumference, wrap a tape measure around the widest part of the head – over the hair, from the forehead, above the ears and around the back, then round to the front again.Make sure the tape measure is snug – a hat should fit snuggly; not too tight or too loose. For the head length, measure from the crown to the base of the ear.Please use the Head Sizing Chart below as a guide only. Facebook Instagram Pinterest Voucher anyone? Join our VIP Club and get 20% discount First Name * Email Address * Cris Crochet Shop will use the information you provide on this form to be in touch with you and to provide updates and marketing. We will treat your information with respect.