Our Knitting Blocking Mats set includes four interlocking pieces for knitting, crocheting, and needlepoint projects, and 50 T-pins. Perfect for beginners and experts alike. Each board measures 12'' x 12'', these interlocking blocking boards with grid lines make knitting accurate and perfect projects fast and easy. The individual blocks can be used for small projects or all four together for larger pieces. Blocking mats can be used for wet blocking or dry projects. Create beautiful home décor items like blankets, wall hangings, tablecloths, pillows, and more with these blocking boards for crochet projects!, If you are not satisfied with your purchase, please get in touch with us, we provide 30-day money back.100% Satisfaction Guarantee for risk-free shopping!