Hephaestus Crafts Blocking Mats for Knitting - Pack of 9 GRAY Blocking Boards with Grids for Needlepoint or Crochet. 150 T-pins PACK OF NINE 12 BY 12 BLOCKING MATS - Includes storage box and 150 T-pins. Portable foam blocking boards let you knit wherever you go. FITS ANY SIZE PROJECT - Use individual boards for smaller knitting projects or piece them together for larger projects. IMPORTANT NOTE: If you are purchasing more than one set, you must purchase the same GRAY blocks. Not compatible with other colors. KNIT / CROCHET MORE ACCURATELY - The grid pattern on the blocking board makes knitting easier and more accurate. THESE ARE THE BEST BLOCKING MATS FOR YOU - We constantly improve this product and listen to feedback from customers just like you. We guarantee you will like this product or we will refund your purchase. HEAT RESISTANT - Our knit blocking boards are great for steam blocking! PERFECT SURFACE TO DRY YOUR KNITS - Our knitting boards prevent moisture from seeping through, making them the perfect place to dry your knits.