Treadstar is the ultimate in floor protection and safety. Here's why: Backing Treadstar has a durable rubber backing, which doesn't curl or crack during the life of the mat. Treadstar is finished with a non-sliding cleated back, providing maximum grip on a wide variety of flooring. Our premium backing allows the mat to stay in place without the frustration of constant adjustment. Face Treadstar offers a synthetic fiber face that resists wear and staining. Additionally, each unique square is rubber reinforced for maximum scraping action. This keeps your floor clean and dry. Treadstar holds an incredible 1.5 gallons of water per yard of the surface mat without transfer to the floor, providing impeccable protection from heavy traffic and poor weather conditions. Sizes Here's a guide - call us for custom sizes. Commercial Double Doors- Light to Medium Traffic - 4x6 Single Doors - 2x3, 3x4, 3x5, 3x10 Commercial Double Doors - Heavy Traffic - 6x6, 6x8 Split Single Doors With Glass Divider - 4x8, 6x8