Ergo Butt Plug Small Platinum Swirl from Oxballs features a super blubbery smooth shape. Each Ergo Butt Plug is hand poured and unique. Made from their best selling high quality smooth Pure Platinum Silicone. Fleshy material and smooth texture are designed for comfort. Tapered shape and flared base are designed to keep Ergo inserted. Ergo is a super smooth silicone butt plug designed for comfort. Its kidney bean shape and tapered neck are designed to keep Ergo snugly in place. It is made from high quality Pure Platinum Silicone so it is blubbery and flesh like, perfect for comfortable insertion. Each Ergo butt plug is hand poured in our factory so no two plugs alike. It is available in 5 sizes ranging from beginner to advanced hole stretcher. Size. Small length: 4 inches, usable length 3 inches. Largest usable circumference 5.75 inches. Smallest usable circumference 3 inches.