Rock Solid Collar Small Black The Silicone Collar from Doc Johnson is made with premium soft silicone, featuring a flat .80″ wide surface which pushes everything forward, maximizing appearance while providing comfort. Rock Solid cock rings enhance size and thickness for longer, harder erections, and completely body-safe.Approximate Product Dimensions:Small – C-Ring, Width/Diameter: 2.5 in. (6.4 […]