This OMNIGRID acrylic ruler supports precise measuring and trimming for quilting, sewing, and craft projects. Sized 1" × 12" (2.5 × 30.5 cm), it combines edge markings with the OMNIGRID double-sight line system so reference lines stay visible on light or dark fabrics. It’s designed for seam allowance work and marking, and it can be used with a beam compass when you need smooth arcs or radius lines.