Heavy Duty Commercial Carpet Tile Each tile measures 18" x 18" Fantastic price! SHIPPING IS FREE!!! Continental US only Listing is for 12 tiles (Each box covers 27 sf) Multiple lots available Color: Black Hobnail. Recyclable Material. Heavy Duty Black Back. This tile has a "rough walk-off mat feel" and is great for entrance ways and indoor/outdoor applications. This is new, first quality carpet tile! Great for workshops, garages, pool houses, patios, business entrances, high traffic commercial locations, etc. Cuts down on track-in dirt and water. Slip resistant - excellent for slippery entrances.