Omnigrid 12-1/2" x 12-1/2" Square Quilting and Sewing Ruler

In general, Omnigrid square rulers are used for secondary cutting of strips, and to square up finished quilt blocksUse with a rotary cutter or a straight-edge bladeDiagonal angle lineEdge markings for accurate measuringLaser cut edges for smooth, deep cuttingPatented double-sight lines that show up on light and dark fabricsHeavy-duty durable acrylic materialLeft- and right-hand numbering and angle systemThe Omnigrid 12-1/2" x 12-1/2" ruler features an extra 1/2" width for seam allowances; it is used to cut, square and trim blocks sized 12-1/2" and under when quilting.