Olfa Frosted Ruler 12.5" x 12.5"This OLFA ruler is the go to ruler for quilters and crafters. It's an ideal for squaring pieced blocks and cutting larger pieces, and is a good size to bring to conventions and retreats. The frosted acrylic surface allows black imprinted numbers to be read effortlessly. Designed for accuracy and precision with grid lines marked in a 1 8", 1 4", 1 2" and 1" increments.