These Heavy Duty Beach-Stone White Plastic Tray 18 Compartment Organizers by N'icePackaging are made out of a highly durable plastic material,.. (Which means that they wont degrade over time and they'll never, ever fade!). They can be used for so many things,.. Use it to stack papers, sort small items like pens, cards, jewelry. And its compact size means that you can put it just about anywhere! They're Stackable too!! Each tray has been specially designed to stack together, with molded feet on each tray that interlock with the tray below them. You'll be able to stack these beauties 20 high if you like for storage and not lose any of the quality or stability. The Tray measures at 16" x 9 1/2" x 1 3/8",.. While the Interior is comprised of 1 Compartment measuring at 15 3/8" x 9" x 1 1/8",.. The Interior is comprised of 18 Compartments measuring at 2 1/4" x 2 3/4" x 1 1/8" each.