The Alloy Metallic Cock Ring is a lightweight, rigid cock ring that is worn around the base of the penis. Designed to aid performance, this Alloy Metallic Cock Ring is available in three sizes with one to suit all. Smooth and seemless, the Alloy Ring offers enhanced support for increased staying power. The Metal Cock Rings measure 1.5 (medium) 1.75 (large) or 2 (ex large) inches in diameter. They all measure 0.75 inches in width.