STIFFY 2-pack cockrings 2 non-roll gripping rings are designed to be the right size for great play. STIFFY'S are shaped to grip soft or hard, 2 grip cockrings that don't roll - they flatten out when you stretch them so they stay where you put them. No rolling=no pinching. STIFFY'S grip tighter for maximum HUNKYNESS.... Height: 19mm / Width: 51mm / Length: 51mm / Outer circumference: 165mm / Outer diameter: 51mm / Inner circumference: 77mm / Inner diameter: 26mm / Made of Silicone