Stripology Squared, a Creative Grids Quilt Ruler designed by Gudrun Erla, makes 'squaring up' a breeze! Follow the easy-to-read markings -- squares for 2 in. cuts, and stars for 1 in. cuts -- no math required! Stripology Squared includes markings to square up half-square triangles, quarter-square triangles, and blocks up to 12 in. And, since the slots are longer to accommodate larger blocks, it is the perfect choice for cutting wider fabrics. The ruler slides easily over the fabric until pressure is applied. Then, the exclusive gripper holds the fabric in place while cutting, eliminating slipping and miss-cuts! Total Size, 14-1/2 in. x 17-3/4 in.