I found my mats at Dick's sporting goods store. They have two types: 1) 2ft X 2 ft mats 10 mm thick pack of 4 for $19.99, and 2) 2ft X 2 ft mats 20 mm thick pack of 6 for $50. I find that I need to have a minimum of 6ft X 8 ft area to do step blast, KPC, and other workouts. I bought 2 packs...