Olfa Frosted Acrylic 16.5"x 16.5"
This OLFA square ruler is easy to read, with its black numbers on the frosted background. And the ruler is easy to use, with its non-slip surface. The ruler is great for squaring larger blocks, borders, pillow templates and for square designs. Non-slip with black markings. Easy to read numbers and gridlines. 1in grid with 1/2in, 1/4in, and 1/8in increments.