Firm and pliable butt plugs provide incremental training stages from small to medium to large. You get a small, medium and large in each kit. Small - 4.7 inches in length, 1/3rd of an inch diameter at the tip, tapering to 1.2 inches at the bottom, base is 2.5 inches wide at it's widest point. Medium - 5.5 inches in length, 2/3rd of an inch diameter at the tip, tapering to 1.5 inches at the bottom, base is 2.7 inches wide at it's widest point. Large - 6.5 inches in length, 1 inch diameter at the tip, tapering to 2 inches at the bottom, base is 3 inches wide at it's widest point.