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″.