I used this method with 15" blocks. It works fantastically! Using 2 fabrics, and only 4 sets of 15" blocks, I have a striking quilt top. I will be bordering it to make it about 6 - 8" inches bigger. Best part is how well the points match up. The next one I do will have more blocks, and the blocks will be smaller, but I expect the same kind of results.