These toys are designed to directly stimulate the clitoris. They are usually small devices about the circumference of a soda can that nestle up to the vagina and clitoris and are held in place by waist or leg straps. Butterfly vibrators are usually designed to resemble an animal, such as a dolphin, hummingbird, rabbit, or of course butterfly, and are quiet and small enough to be worn in public. Many people find that the best thing about butterfly vibrators is that they are virtually hands-free