You will need to downscale it, to do that measure the width of your chest from armpit to armpit then convert the inches over to millimeters enter the number in the width in pepakura, then rearrange the pieces.
I have it a little big because I'm going to be making it with stilts for my suit. If you are going to construct it from EVA Foam which I suggest you do assemble as many flat sides as you can such as the top, back and bottom to be able to cut those sections larger than small pieces at a time. Helmet will be up later tonight or tomarrow. As for the teeth design on the chest meausure and cut out triangles for it. It was not put on the 3D model so you will have to scratchbuild the teeth on.
