With this ruler you can create Fans, Dresden Plates and other circle designs up to a finished size of 38". Create a complete circle with 12 of the 30 degree trangle pieces, a half circle with 6 pieces, and a quarter circle with 3 pieces. The vertical lines can be used to fussy cut stripes or to cut half triangles. This triangle may be used as a companion to the Circle Savvy Ruler #CGRSAV1. Equipped with Creative Grid's exclusive grip, this ruler slides easily on fabric yet stays in place when pressure is applied. Use the included instructions or scan the QR code to view a video demonstration. Made in the USA. Designed by Susan Emory & Christine Van Buskirk.