As big as they come! This monster seatback bag is great for shopping, laundry, groceries, and more. Frame allows bag to remain open. Fits both wheelchairs and scooters. Adjustable straps convert to fit scooter seatback and wheelchair push handles. Constructed of high quality water-resistant fabric with durable nylon webbing straps. Made in U.S.A. Side compartments provide quick access to items that you need to keep handy. Measures 13 inches wide x 18 inches high x 10 inches deep.