OmniArc 8-Inch-by-8-Inch Non-Slip Circle Cutter The OmniArc Quilt Ruler is designed to give you ultimate accuracy when it comes to measuring, marking, and cutting Features clear acrylic construction with black and fluorescent green markings, and instructions for use Package contains one 8 by 8 inch circle ruler for 4 inch, 6 inch, 8 inch, 10 inch, and 12 inch circles