Prym 611655 Omnigrid Patchwork Squares are every crafter’s reliable companion. An essential tool for patchwork, dressmaking and tailoring, these transparent rulers with black and yellow grid markings allow you to work on all types and colours of fabric. Each ruler is made from scratch-resistant plastic with hard-wearing resistance to preserve the grid lines and ensure their longevity. This square ruler simplifies the cutting of a variety of rectangular, triangular or square shapes with perfect precision. It is safe to use with a hobby knife or rotary cutter. This ruler measures 20 x 20 cm.