The Omnigrip ruler is a rectangular ruler used for cutting strips and trimming fabric edges during quilt making or when executing a variety of sewing and fabric craft 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. Details: 8.5" x 24" (21.59cm x 60.96cm) Has an extra 1/2" for seam allowance Use for quilting, sewing and crafts or any DIY project that calls for cut fabric Use with a rotary cutter (sold separately) for a straight-edge blade Painted non-slip backing to hold ruler in place during cutting Multiple degree angle lines for easy pivot of 30°, 45° and 60° cuts Edge markings for accurate measuring Laser cut edges for smooth, deep cutting Patented double-sight lines that show up on light and dark fabrics Left- and right-hand numbering and angle system Heavy-duty durable acrylic material