Designed by Karla Alexander, Christine Van Buskirk and Susan Emory, the Creative Grids Circle Savvy Ruler cuts circles, semi-circles, and quarter-circles from 3 to 15-1/2 inches and every 1/2 inch in between. The way this ruler was designed, it can be used in a number of techniques: fusible applique, piecing and turned-edge applique. The ruler comes with fully illustrated step by step instructions or scan the QR Code printed on the ruler to view a video demonstration. The ruler slides easily over the fabric until pressure is applied. Then, our exclusive gripper holds the fabric in place while cutting, eliminating slipping and miss-cuts! Total Size - 11-3/4in x 18-1/2in Creative Grids® products are made in the USA and sold in independent quilt shops only.