The OmniArc non-slip circle cutter ruler has handy grooves and easy-to-read angle markings for cutting circles with a finished diameter of 4", 6", 8" 10" or 12". Use it for quilting, sewing and crafts - any DIY project requiring circles. You can use with a rotary cutter or a straight-edge blade. The patented non-slip backing holds the ruler in place during cutting. It has edge markings for accurate measuring and laser cut edges for smooth, deep cutting. The patented double-sight lines show up on light and dark fabrics. It is made from heavy-duty durable acrylic material.Details:7" x 7"Laser cut edgesDouble-sight linesAcrylic