This throw size quilt is made from a modified pattern in the "Stripology Squared" book by Gudrun Erla. The cutting is done with the Stripology Ruler. Everyone who trains on this technique loves the process and the results. The "Polygon City" quilt is made using pre-cut 10" squares sometimes referred to as "Layer Cakes", and the pattern is written so that you can make it in a variety of sizes. We have a classroom set of the books to be used to make personal quilts only.