This giant pillow came very tightly and cleverly vacuum packed down to a small bag about 38“ x 20“ x 6“ it expands like a memory foam mattress but it does it almost immediately you don’t have to wait for days. It’s a little bit soft maybe not quite a supportive as I’d like but overall I think I’m happy with it. It definitely has helped make the daybed a lot more viable for couch-like use.