This Intex Twin Classic Downy Airbed Mattress drops from $15.97 to $7.97 at Walmart.com. Plus, shipping is free. You can also pick it up at your local store, depending on availability. This is the best price we found by $15 shipped. This will fit twin sheets and measures 12.5" x 10.8" x 4.10". Sales tax is charged in most states.