Sullivan 16-1/2-Inch-by-16-1/2-Inch The Cutting EDGE Frosted Ruler 16-1/2 by 16-1/2 inch frosted ruler Full see-through non-skid frosting keeps the ruler from sliding and makes it light enough to see your fabric through it Features large numbers make for easy visibility Diamond powder edge maintains the sharpness of your rotary blade as it spins