The Trinity Silicone Anal Set is 3 plugs that gradually increase in size. Enjoy taking your partner through the joys of anal sex. Each plug has a handy O-ring at the end for easy insertion and removal. You get 3 plugs with each set: Small (2" insertable length, 1" in diameter), Medium (2.5" insertable length, 1.25" in diameter) and Large (3.25" insertable length 1.5" in diameter).