White Starburst Bathtub Bath Tub Treads Non Slip Improve the safety of your tub or shower. Each package contains 21 star shaped tread pieces. Durable for long-lasting non-slip safety. Easy to install, just peel and stick. For use on non-textured surfaces. Tread Piece Sizes - Each package contains three different tread sizes. Large: 4.5" by 4.5". Medium: 3" by 3". Small: 2" by 2".