The Flying Geese x 4 Ruler takes the hassle out of cutting fabric for flying geese blocks. Designed by Joan Hawley of Lazy Girl Designs, the Flying Geese x 4 Ruler does all the math for you, helping you create 12 different sizes of flying geese effortlessly. Take full advantage of the Flying Geese x 4 Ruler with Joan Hawley's Flying Geese and More Book which utilizes this handy tool.