Omnigrip Non-Slip Quilter"s Ruler is made especially for quilting, sewing, and crafting projects. Can be used with rotary cutters or straight edge blades. Made with a unique numbering and angle system that is sure to help with your projects. Made for left or right handed individuals. The clear background and neon lines make this ruler easy-to-use. Ruler measures: 12.5 x 12.5.