Olfa- Frosted Non Slip Rectangular Ruler with Grid-6"x24". Features a frosted acrylic ruler with black numbers and lines for clarity on light and dark colored fabrics. It also has easy to read grid lines-1"grid with 1/2", 1/4" and 1/8" increments for precise measurements. Olfa Grid also features a non-slip surface for stable and safe cutting. You can also easily make 15