GO! Quilting Ruler - 12 1/2" x 12 1/2" (#55475)GO! Quilting Ruler 12 1 2" x 12 1 2"is a non slip ruler with easy to read 1" grid with 1 8", 1 4" and 1 2" increments and 45 angle lines. and can be used with the GO! 45mm Rotary Cutter (55449) and GO! Rotary Cutting Mat 18" x 24" Double Sided (55448) for pre cutting fabric strips for use with your AccuQuilt GO! Fabric Cutting System. Product Details GO! Quilting Ruler 12 1 2" x 12 1 2"is a non slip ruler with easy to read 1" grid with 1 8", 1 4" and