The Kenney Suction Cup Bath Mat Treads in clear are an ideal and fun solution for inside your bathtub or shower. Designed with a secure, no-slip grip, suction cups on the bottom help to keep the treads in place. Measuring 4.5 inches wide by 4.5 inches long (11.4 cm x 11.4 cm), they should be used on smooth surfaces as suction cups may not stick well to textured surfaces or textured tile. Tread and tub surfaces should be clean and free of soap or bath oil before each use. Wet floor of tub or shower for better suction. Place mat in desired position and press firmly to adhere suction cups to the surface. Not for use on textured surfaces.