The Convex curves up your torso for a unique and comfortable fit. It can stretch for placement, yet retains its original shape. This TPE material allows for a light stretch to get it placed right. Rock Solid cock rings enhance size and thickness for longer, harder erections, and are completely body-safe. Approximate C-Ring Dimensions, Width/Diameter: 1.75 in. (4.4 cm), Unstretched Inner Diameter: 0.8 in. (20 mm), Depth: 0.8 in. (19 mm). For Adults Only