This simple yet effective organizing tool has so many uses: a mailbox, material holder, stationery sorter, craft or office supply storage. Steel shell and support shelves add stability and durability. Letter size, 9.75w x 12.5d x 2.5h compartments are made from heavy-duty corrugated fiberboard. Wide shelf front serves as label area (labels included). Easy assembly with quick-locking fasteners. Over-sized compartments hold up 550 sheets of paper.