A Stamper's DELIGHT! Thin Acrylic Shapes With Laser-Etched Gridlines in 1/2" Increments. Set of 9 in Various Sizes, Each Measuring Approximately 1/8" Thick. Embark on your artistic journey with this collection of Grid Blocks from Tim Holtz. The blocks have an etched Grid Like pattern for easy placement and accuracy. To use with cling and clear mount stamps, simply place stamp directly on blocks and stamp.