Quilters and crafters rely on their rulers, and you can rely on this OLFA® square ruler. It's an ideal substitute for larger square rulers. Use as a template for squaring up to 9" blocks, borders and backgrounds and for cutting squares, triangles and strips.  Non-slip with black markings. Easy to read numbers and gridlines. 1in grid with 1/2in, 1/4in, and 1/8in increments.