From designer Tim Holtz and Stampers Anonymous, grid blocks are innovative tools to make stamping so much easier. These thin acrylic blocks have an etched grid pattern for easy placement and accuracy. Use with clear or cling mounted stamps by simply placing the stamp directly onto the block and stamping. Each package includes nine acrylic blocks in the following sizes: 1x2inch, 1x 5inch, 2x2inch, 2x3inch, 2x7inch, 3x4inch, 4x6inch, 4x8inch, 5x6.5inch.