Oval - Bathtub Bath Tub Treads Non Slip Applique Sticker Bathroom Mat (Clear) Improve the safety of your tub or shower. Each package contains 21 pieces. Durable for long-lasting non-slip safety. Easy to install, just peel and stick. For use on non-textured surfaces. Approximate Tread Piece Sizes - Each package contains three different tread sizes. Shape sizes may vary. Large: 4.5" by 4.5"  Medium: 3" by 3"  Small: 2" by 2"