The Royal Butler is a soft, silicone material that is powerful and pliable. TV's favorite Talk Sex show host brings you another unique creation from her line of toys. It is waterproof for fun in and out of the water and has the big thumbs up from the super Doc. Sue Johanson herself! It measures 5½ inches with a maximum circumference of 4¾ inches and takes 2 AA batteries that are included.