This is Original Power Beat Skin Head , One of the most famous and best companies in this industry .. The skin will Suitable and fit for any Sombaty Egyptian Darbuka Doumbek 18.5'' and 19'' height .. Classic Size Head Skin Dimeter = 9'' (22.86) /0.5" Collar ... Please measure the drum head, before ordering ,The diameter of the head - is measured by the inside diameter of the head or the outer diameter of the rim on which the drum head sits - please pay attention!