I just found this helmet stand thing from pepakura official download. It works great for spiderman face shell. I just use the size as it is, but I have a really small head. If you have a bigger head, you might want to enlarge it by 10 percent. It is easier to make just use scissors to cut the paper. I just put some putty on it, and going to fiberglass it and sand it down. It should look great.