Tokyo Futon Sofa Sleeper Bed Frame, Queen-size, Black Arm Finish The black steel alloy grid style seat and back decks are the perfect platform for any futon mattress Durable hinge mechanism provides an easy convert from sitting to sleeping and back to sitting Frame works with all full and queen-size futon mattresses (mattresses sold separately) Innovative engineering enables sofa to fit through any doorway or up narrow stairways; ships in two packages. Sleeping dimensions: full 54 wide by 83 long, queen 60 wide by 88 long, 24 arm height, full 32 back height, queen back height 38