Kit includes three dongs with suction bases to provide a secure grip for hands-free fun. Harness-compatible strap-on O-ring style. Made of durable phthalate-free Sensafirm PVC material. Small dong is 4.25 in. insertable by 1.5 in. diameter. Medium dong is 6 in. insertable by 1.75 in. diameter. Large dong is 7.25 in. insertable by 2 in. diameter.