The Vivid Magnetic Foldable Dice Rolling Tray from Ultra PRO provides a secure and aesthetically pleasing area for rolling dice. While flat, these trays are no larger than a sheet of paper (8.5 in. x 11 in.) and feature small magnets in each corner that allow the sides to pop up effortlessly to keep dice under control when rolling. You can conveniently store your dice rolling tray in your backpack, character portfolio, or beloved board game box. The interior and exterior are composed of the same vibrantly colored material.