Take a piece of paper about 120cm long by about 70cm wide. Some pieces of printer paper can be taped together, to make a big enough piece.
Look for an outline of the headdress part of an ancient Egyptian Death Mask. Searching ‘Anubis’ also brings up some suitable images. There’s a plethora of online reference pictures available. This may sound odd, but look for images of the traditional, ceremonial wig worn by The Speaker of the House (a UK parliamentarian) - the kind of wig with the long flaps down either side. This makes a mean base from which to design a template for an ancient Egyptian headdress. The attached picture is of some judges; or possibly actors playing judges, because they look a little too posed. But their wigs are great.
When you have enough images, start sketching. In our design, the meeting point of the back and front will fit together later on (when the back is folded over, the tops of the two fronts will be joined to the top sides of the back, at a sort of ‘shoulder’ area). Make sure your sketched template fills the whole paper. Better too big than too small.
Our headdress has to fit over a big dog-like head, so our template is ‘roomy’ round the face. I’ve made some red lines around the face in one of the photos as a bit of a guide, if you need to bring the face area in.