Why two clients with identical head circumference may need entirely different prosthesis patterns Hair & Wig Science Series | HIASTI Clinical Education Two women sit for consultation on the same afternoon. Both measure 22 inches around. If circumference decided the pattern, they would leave with the same unit. They will not. One needs a deeper occipital curve and a shortened front-to-back. The other needs recessed temple points, extra rise through the crown, and a base that c