I have attached a .pdf of the hexagon that I used to make my folded flowers. For my own use, since I was making several the same size, I traced the hexagon onto some plastic for use as a template. This technique could be done with just about any size hexagon, depending on your needs. The folded flower will be half the size of your original hexagon.
Once you have your template, be sure to mark the center of each side, and the center of the hexagon.