This three-pack of The Gasket thin circle cock rings are made from a soft TPE material which allows for a light stretch to get them placed right. Rock Solid cock rings enhance size and thickness for longer, harder erections, and are completely body-safe. For Adults Only Approximate Large C-Ring Dimensions, Width/Diameter: 2.5 in. (6.4 cm), Unstretched Inner Diameter: 1.9 in. (48 mm), Depth: 0.2 in. (6 mm) Approximate Medium C-Ring Dimensions, Width/Diameter: 2 in. (5.1 cm), Unstretched Inner Diameter: 1.6 in. (41 mm), Depth: 0.2 in. (6 mm) Approximate Small C-Ring Dimensions, Width/Diameter: 1.75 in. (4.4 cm), Unstretched Inner Diameter: 1.2 in. (30 mm), Depth: 0.2 in. (5 mm)