This iron trundle bed is twin size and in great condition. It folds up and down and has wheels so that you can store it under another bed or in a closet, basically you can move it around fairly easily unlike a regular stationery bed frame. I looked elsewhere on the internet and these are being sold for anywhere from 75.00 all the way up to 200.00 so this is a very reasonable asking price. Simply drop me an email if you are interested in coming by to take a look at it in person. Thanks allot! (Mattress & Box springs pictured in one of the photos is NOT included) You can use a regular twin size mattress with this trundle bed or a futon mattress or air mattress would also work....