The IRIS letter box accommodates standard (8.5" x 11") paper, files, documents, notebooks, crafts, and school supplies. Durable buckle latches on the tote lid secure the contents inside. This is the perfect storage solution tool to store a variety of items at your home, office or school. Stackable for maximum storage. Number of Compartments: 1; Interior Volume Capacity: 2.3 gal; Boxes/Bins Material Family: Plastic; Material(s): Plastic.