Creative Grids Quilt Ruler 3.5 Inch by 3.5 Inch Square. This 3-1/2 inch square features easy-to-read black and white markings printed in 1-inch grids marked in 1/8 inch and 1/4 inch increments. Use the easy-to-read, black numbers (printed on white dots) and the 1/4-inch grip sides to cut whole inches. The 1/4 inch dashed lines printed on two adjoining sides aid in trimming seam allowances. The ruler slides easily over the fabric until pressure is applied. Then, our exclusive gripper holds the material in place while cutting, eliminating slipping and miss-cuts!