The Omnigrid 9-1/2 square value pack contains one each of 4 square Omnigrid quilting rulers (2-1/2 4-1/2 6-1/2 and 9-1/2 ). Each has an extra 1/2 for seam allowances and diagonal angle lines. Use them to cut square and trim blocks. The patented double-sight lines show up on both light and dark fabrics and the laser cut edges help create a smooth deep cut.