Start small and work your way up to medium and large with this quality anal training kit. It consists of 3 super smooth silicone butt plugs in different sizes, all with a flexible shaft that has small ridges to stimulate where you are most sensitive. Only use with water based lubricant. <br /><br />Small butt plug is 1.18 inches at is widest point. Medium butt plug is 1.57 inches at its widest point. Large butt plug is 1.96 inches at its widest point.