Waffle Grid Packs Each clear plastic grids measures 11" x 11" and can interlock to form multiple sizes for your work surface. Use as an easy to clean cutting surface and turn upside down for a smooth drawing surface that can also be back lit. Creator's stained glass tools and Morton System tools all plug into this grid surface. You can expand the grid surface to any size table by purchasing additional sets. Sold in sets of 2, 4 and 6 grids per pack.