Creative Grids Quilting Ruler 16 1/2 Inch Square (CGR16) Easy-to-read black & white markings. 1" grid with 1/8" and 1/4" increments Use numerical white dots & 1/4" grip sides to cut whole inches. Turn-a-Round to use the 1/2" grip side & numerical black dots to add the seam allowance. Gripper holds fabric while cutting.