Cushioning Futon Storage Case, Square, Futon Cover, Gray, Sheets, Comforter, Mattress Used for 1 year. My child kept getting off the mattress and bumping their head on the wall, so I used these cushions to prevent that. You can store off-season futons and sheets inside to make a cushion. The size is an easy-to-use square shape, 38cm x 38cm x 18cm. There are 3 of the same item, would you like them together? They are washable, so you can keep them clean!