In the beginning of manufacturing process the bull's penis that is usually 23-25 inches long, is removed and cleaned. It is hung vertically for the fluids contained to fully drain. Without these fluids bully sticks are odor free. At the next stage of processing bull penises are stretched, twisted or braided, dried and then may be smoked for flavor. The result is a 30-40 inches long very hard brown stick which is cut into pieces suitable for dogs of any size. Thus you can buy small bully sticks of 4'', large beef pizzles of 30 inches and any length between, such as 5'', 6'', 7'', 9'' and 12''.