This ruler designed by Karla Alexander for Creative Grids® creates unique four-patch blocks that give the illusion of curves in a quilt. · 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 ruler markings to cut up squares ranging from 4in to 10in making this a precut friendly tool. · Finish block is approximately 3/4in smaller than starting square. · Comes with fully illustrated step by step instructions. · Scan the QR Code printed on the ruler to view a how-to video of these features and to see the patterns that can be made with this ruler. Total Size: 6in x 10in 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.