SlipX Solutions Pebble Bath Treads (Clear, 6 Count, 4.5" x 4.5") Provides subtle contours and shape variations that massage and comfort your feet. Machine washable. Adheres with suction cups, keeping the treads from moving around underfoot. For use on non-textured surfaces. Each package contains 6 treads. Each tread is 4.5" x 4.5".