You can get a futon in a variety of sizes, including both queen and full. Queen bi-fold futons (futons that only fold into two sections) are 80 inches from arm to arm and about 37 inches wide when folded. Full bi-fold futons are 75 inches from arm to arm and around 37 inches when folded. You can get tri-fold queen and full futons, though the bi-fold is by far the most common frame type.