ECR4Kids Letter Size Tray with Lid, Contemporary, 10-PieceSold and Shipped by ECR4Kids Seller Info Keep worksheets, assignments and other papers organized with the Tray Storage Bins. This 10 pack of versatile stacking bins comes with lids to keep supplies contained and can hold papers sized up to 9" x 12". These sturdy plastic trays are great for keeping art supplies, schoolwork, handouts, and student papers neatly organized. The curved interior makes it easy to remove content and non snap lids make it