Perform like a porn star with our pure premium silicone cock rings from Performance, a brand you can trust. Stay harder and longer with these male enhancement rings that are a blend of taut and stretchy. It can be stretched up to twice its original diameter. With 3 sizes to choose from for the perfect fit, wear 1 to increase your sexual stamina or wear multiple cock rings around both your cock and balls. Dimensions diameter small ring 1.25 inches. Medium ring 1.75 inches. Large ring 2 inches.