Anchor base for increased stability and comfort! Only 1.5" at its largest diameter this plug is a good beginner toy. The Ryder has a gradual curve from the body to the neck of the plug which means it won't shock the sphincter muscles going in or coming out. Harness Compatible: Yes Safe For Your Body: Made from Tantus’ own unique formula of 100% Ultra-Premium Silicone Easy To Clean: Eco-Friendly Hypoallergenic Hygienic Boilable Bleachable and Dishwasher Safe. Diameter: 1.5" Length: 4.6"