2 x 3 in black. Floor mats can be your metal entry landings worst nightmare. At roughly $1000 replacement cost per landing, it’s worth getting a mat designed to drain. If a floor mat is a must, then a 4-way drainage mat is a must have. While you don’t have to purchase it from us, we highly recommend this style over any others we have tested. As you can see (see floor mat pictures) if a mat cant drain then the water will start to rust out the landings.