Cushioning Futon Storage Case, Square, Futon Cover, Gray, Sheets, Comforter, Mattress Used for 1 year. My child kept rolling off the futon and bumping their head against 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 a convenient square shape, 38cm x 38cm x 18cm. I have three of the same, would you like to buy them together? They are washable, so you can keep them clean!