THE PERFECT CYLINDER in.Oin. SHAPE * SUPER COMFORTABLE * DIMENSIONS: INNER DIAMETER: 1.25in. HEIGHT: 2in. LENGTH: 2in. WIDTH: 0.375in. THE LATEST GLOW-IN-THE-DARK TECHNOLOGY IMMERSE UNDER BRIGHT LIGHT OR IN SUNLIGHT BEFORE USE TO IGNITE THE GLOW EFFECT Only use with water-based lubricant. Clean with anti-bacterial soap and water. Sila-Flex is a premium, phthalate-free hybrid silicone with an ultra smooth and soft finish. durable, unscented and extra stretch, while retaining the original shape.