The wide, flat sides and rugged tread design of The Tire give you and your partner extra texture for a great time. The super stretchy silicone allows for easy placement and a tight grip. The Tire's phthalate-free, body-safe, glow-in-the-dark material keeps the bedroom aglow as long as you last. Approximate Product Dimensions: C-Ring, Width/Diameter: 2 in. (5.1 cm), Unstretched Inner Diameter: 1.0 in. (25 mm), Depth: 0.7 in. (17 mm),