I have never done one with the blocks on point. I usually tried to do my blocks about the same size as the pillow part I put on the back. I could attach the pillow square through all the layers and the seam would end up on the sashing of the front blocks. I would do 3 blocks wide and 4 blocks long. What part are you having trouble with? You can do it any size you want as long as you can fold it in thirds to go into the pillow square.