Beautifully crafted traditional Japanese design tatami floor mats, offered here in 4 sizes, note too that we offer 4 more sizes on Amazon. Durable double weave rush grass stretched onto 2" thick, kiln dried dovetailed hard pine frame, with a Tyvek like material moisture barrier bottom to resist floor level dampness. Use several to cover floors in many configurations, our 36" wide tatamis are available in 3 lengths - 3, 6, and 7 feet long. Use a single mat as simple decorative platform on the floor, raise off the floor with patio blocks or wood blocks, add cushions for an attractive reading or meditation space- put a tatami mat against a wall for a sofa back. Tatami mats are a popular alternative platform bed or futon sofa, right on the floor, or wood slats raised on patio blocks. A tatami mat on it's side behind a platform bed makes a great looking and comfortable head board. A single 38" x 80" works for a twin size mattress, which normally measure 39" x 75, use two 30" x 80" for a standard American queen size mattress, or two 38" x 80" for extra space around the queen mattress, or use two 38" x 80" for exact fit for US king size mattresses or futons. For Cal. king, use two of our 36" x 84" mats. Note too that we also offer 3 tatami mats sized to fit Euro full, queen, & king on Amazon.com. Note we offer simple wood frame beds designed to fit some of our tatami mats, search Amazon for "Tatami Bed". Ships in 48 hours from our Massachusetts warehouse, professionally packed, fully insured via FedEx, expedited delivery available. Click on Orientalfurniture.com link next to the item price on this page to browse our Amazon.com store front for 2000+ unique Asian design furnishings - furniture, room dividers, art, lighting, fine porcelain, textiles, and fine gifts!