From Sew Kind of Wonderful, the Wonder Curve Ruler is a 6 in. x 10 in. curved piecing tool featuring colored lines and markings that make it wonderfully simple to make a combination of curved blocks -- see Wonderful Curves Sampler Quilt Block Book for 30 different options. These unique lines and markings make using the Wonder Curve Ruler easy as, 1-2-3! Another WCR feature: the three bold colored lines also make it easy to scale a block larger or smaller just by aligning fabric with the different colors and marks. Watch a YouTubevideo demonstration on how to use the Wonder Curve Ruler and receive a free curved block quilt pattern Breakfast Club from Sew Kind of Wonderful.