Rolodex Mesh Collection 3-Tier Desk Shelf, Letter-Size, Black (22341) Storage tray is constructed of durable plastic that stands up to daily wear and tear. Area for label on each shelf for quick identification (labels sold separately). Can be hung on partition wall for off-desk storage or stand alone on a desk. Holds letter-sized documents. 9.25 inches long by 13.13 inches wide by 12.5 inches high.