Rump Rockers by Gossip includes three different sizes for anal stimulation. It has graduated sizes so you can choose your comfort level and work your way up in sizes if desired. Each piece has a curved base for easy wearability. Made of silicone and easy to clean. 

• Silicone 
• Small- Total Length: 3.25 inches Insertable Length: 2.125 inches Width (Diameter): 0.875 inches
• Medium- Total Length: 3.875 inches Insertable Length: 2.5 inches Width (Diameter): 1 inches
• Large- Total Length: 4.75 inches Insertable Length: 3.125 inches Width (Diameter): 1.25 inches
• Waterproof