Vivid Magnetic Folding Dice Tray - Purple (Ultra PRO)The Vivid Magnetic Foldable Dice Tray offers a safe and portable space for all your dice rolling needs. These trays are no bigger than a sheet of paper (8. 5 in. x 11 in.) when folded flat, and utilize small magnets in each corner so you can quickly pop up the side walls, perfect for keeping stray dice contained when rolling. Simply unfold the magnetic dice tray again to store it in your backpack, character folio, binder, or favorite board game box.