Carpet stair treads provide safety, sound reduction, and beauty. Tiles are manufactured using the hightest grade, soil-hiding nylon. Easy-to-install with tack, staple, or glue. Each tile is 8" x 18", 13 tiles of the same color in each package, enough to do the average staircase. They are shipped 6 packages to a case, as many as 6 colors to a case. 10 year warranty, copy enclosed.