I based this on an image from Wikimedia Commons. My version is about 6.5cm across the horns. I liked the idea of making some of the hair moveable, so on the forehead I used some "Turkey Rug Stitch" on top of some other stitches. I shaped the face and added volume by bending it and sewing additional layers of the underlying fabric to the back. When I had finished, I added a pin at the back so it could be worn as a brooch/badge.