I would not attempt to enlarge a pattern such as the Drunard's Path on a copy machine These machines are not always correct in their enlargement. Also you need to think about the seam allowance as indicated above.
I would start from beginning and draw on graft paper and with a compas add the curve and then you can either cut and make templates or cut out each piece (I make two copies) and add the seam allowance and then glue to plastic for your template.