There is some half square triangle paper on a roll . It is the easiest for me and it is always perfect. Google half square triangle paper and you can find where to buy it online. Some quilt stores will carry it. comes in different sizes, look for the finished size that you need. you put your 2 pieces of fabric right sides together, place your triangle paper on top. sew on the sewing lines, then cut on the cutting lines and like magic....you have a lot of half square triangles in no time and they are all perfect!!