I wanted a folding sleeping mattress that would not take up a lot of space and to take the place of an air mattress used for company.  I bought the queen size mattress. Folded, it would make a perfect seating for younger children. Although I have used it for a quiet place to read and also slept on it.  I am of short stature and found I could leave it 1/2 folded; giving double the height and did sleep comfortably.