ARTEZA Quilting Rulers Set of 4, Acrylic Square Quilting Rulers for Sewing and Fabric Cutting, 4.5 x 4.5, 6 x 6, 9.5 x 9.5, 12.5 x 12.5 Inch, Dual-Color Grid, 30/45/60 Degree, 48 Non-Slip Rings