One futon bag easily fit a double-sized comforter. When you put futons and clothes in it, it becomes a cushion. It's really sturdy. One is completely unused. The other one was only used once for a double-sized comforter. Ultimately, it was too big for my house, so I compressed it. However, it was a bit too big for my house, so I have two! Please refrain from purchasing if you are overly concerned about details. I am also selling on other sites, so please comment if interested.