This 10 degree triangle from Creative Grids® is used to cut wedges to make circles up to 31-1/2in wide. · Made in the USA with high quality acrylic and precision measurements ensuring accuracy for your quilting, sewing, patchwork, and crafting projects. · Creative Grids® exclusive non-slip grip allows you to easily slide the ruler over the fabric until positioned correctly. Then, when slight pressure is applied, the grip holds the ruler in place, eliminating slipping while you cut. · Easy to read black and white markings. · Use the vertical lines to fussy cut stripes and to cut half-triangles. 1/4in seam allowance is clearly marked down the middle of the ruler. · Use the 45 degree angled lines to create a variety of designs. · Sew 36 of these 10 degree wedges together to make a full circle up to 31-1/2in wide. · Go to https://www.creativegridsusa.com/products/CGRT10 to see a how-to video and to see patterns that can be made with this triangle ruler. Total Size: 3-1/4in x 16in Creative Grids® Rulers are made in the USA and sold through independent quilt shops as well as select online retailers. Creative Grids® products have a MAP/IMAP (Minimum Advertised Price/Internet Minimum Advertised Price) Policy. Please do not advertise them for less than the suggested retail price.