Grey Mighty Line Foot Prints are 12" by 5", pack of 50. Mighty Line footprints are a great 5S tool. These footprints can highlight traffic ways through the warehouse. Keep your workers safe by organizing your foot traffic. This product is 50 MIL thick. To apply, just peel the adhesive backing and stick to a clean, dry floor. This product does not leave residue during removal. This product is warrantied to stay on the floor for 3 years.