One thing to watch out for: if you put these paper patterns on a copy machine, they do not always come out perfectly. It's called copy machine distortion. At a 4-H quilt camp (ages 10 to 18) we worked with 8 1/2 x 11 sheets that had six 3 inch squares on it. The bottom two were not quite right. One of girls had to cut all her HST's to a smaller size to compensate.