The Colt Anal Trainer Kit entails three firm, pliable, and tapered butt plugs, which range in size from small plug measures 4 inches by 1 inch, medium plug measures 5 inches by 1.25 inches and large plug measures 6 inches by 1.5 inches. These butt plugs are the perfect trainer, providing incremental stages from small to medium to large. Let the training begin!