DRITZ-Omnigrip Non-Slip Quilter's Ruler: Squares; Rectangles and Strips. This acrylic ruler was 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 6x14in. Made in USA.