OmniArc 8-Inch-by-8-Inch Non-Slip Circle Cutter
These rulers were designed to give you ultimate accuracy when it comes to measuring, marking, and cutting your pieces out.  Rulers feature clear acrylic construction with black and fluorescent green markings, and instructions for use.  This package contains one 8 by 8 inch circle ruler for 4 inch, 6 inch, 8 inch, 10 inch, and 12 inch circles.  Made in USA.