Made of 100% Ultra-Premium Super Soft ?silicone. this is an advanced toy for people who know what they are doing and demand quality from products they put in their bodies. Made from Tantus' own unique formula of 100% Ultra-Premium Silicone. Top Head Diameter: 2.4 inches. Middle Bulge Diameter: 2.9 inches. Bottom Shaft Diameter: 1.6 inches. Base Diameter: 2.8 inches. Length: 10 inches.