The independent scrotum rings of the Silicone Ball Spreader™ provide added support and stamina. This erection enhancer is made from stretchy, comfortable Silicone that's body-safe, unscented and phthalate free. <br><br> 1.25”/3.25 cm (penis ring diameter) <br> 1”/2.5 cm (scrotum rings diameter) <br> 4” x 2.5”/10.25 cm x 6.25 cm (overall)