My apoligies! I just realized this is a HEXAGON and not an Octagon! I had just seen a tv quilt show about Octagons and I had that on the brain! What I did was trace one side of the ruler and drew lines up from each side until they intersected. I now know I could make my own template but instead I just ordered the pryamid ruler from Fons and Porter. Life is just easier when I use a ruler and not my own template. Sorry about the confusion.