Tantus Vibrating Progressive Beads are brilliantly designed to help you feel the heights of anal pleasure. A series of four beads increase gently in size from 3/4â   to 1 3/4â   and are perfectly spaced for pacing yourself. Each time a bead is pulled out, sphincter muscles contract automatically and help to build up momentum for orgasm, with an additional removable 3-speed waterproof vibrator to help push you over the edge. The smooth, easy-entry beads flex with the body's curves and end with an anchor base that tapers slightly for a flawless fit between the cheeks. Diameter, 1st Bead: .75", 2nd Bead: 1", 3rd Bead: 1.25", 4th Bead: 1.4", Base: .9", Dividers: .25", Insertable Length: 11".