6x12 Entrance mats offer superior protection against slip and falls when used in front of double doors. A 6'x12' Outdoor mat coupled with a 6'x12' indoor floor mat will stop over 75% of dirt and moisture from entering your building. An ideal 6x12 outdoor entrance matting will have a surface fiber made from polypropylene which will dry quickly. The best indoor 6x12 walk off mats will usually have a thinner denier (thickness) fiber made from an olefin, nylon or polypropylene. 6x12 commercial entrance floor mats are large enough and heavy enough that they usually stay in place even during high traffic situations.