2 mattresses, each 4.5 feet x 2 feet x 6 inches high.  They were originally the seat and back cushions for a futon.  Have had very light use, and were inside a cover, so no stains or rips,  and not squashed down in the middle.  Also, no odor.  These are stuffed with some synthetic cottony stuff, and so are pretty heavy.  Also they are not super soft or bouncy the way something with foam rubber or springs in it would be.  But they're sitable, or would make a nice play surface for kids.