Creative Grids 45 Degree Half-Square Triangle 8-1/2in Quilt Ruler. This 45 degree triangle cuts half-square triangles up to a finished size of 8 inches. Since the tip is trimmed, all squares and triangles can be cut from the same strip of fabric. A dashed 1/4 inch seam allowance is printed around the entire edge of the ruler. The ruler slides easily over the fabric until pressure is applied. Then, our exclusive gripper holds the fabric in place while cutting, eliminating slipping and miss-cuts! The ruler comes with fully illustrated step by step instructions or scan the QR Code printed on the ruler to view a video demonstration of these features. Total Size - 8-1/2 inches x 9 inches. CHK-CGRT45