Perfect Fit brings you the foremost cock ring sizing system designed for exceptional fit and effectiveness! Cock rings that are 0.1" (2.5mm) apart in sizing allow each man to find his perfect size. Hence, Xact-Fit (TM). Experience cock rings that are easier to get on and off than metal rings and also orgasmically effective! The Play Zone kit contains the nine most employed Xact-Fit sizes for shaft, balls, and cock & ball rings. Made of a plush soft touch silicone the Xact-Fit ring is premium quality and incredibly strong. Each Xact-Fit ring is stamped with its size so no more guessing! Stack the rings for additional fun. If you if have favorite sizes you can order the perfect Xact-Fit size individually in the future. The Play Zone comes with a storage cone designed specifically to hold the Xact-Fit rings perfectly. The Play Zone comes with PF Size #11-#19. From Perfect Fit Brand.