First off Marvel items get posted in Marvel costumes and props.
Second, ya gotta read man. As my Scottish brethren said measure. Get tamasoft's Pepakura viewer, the paid version gives you more choices plus. Download the file, open in pep viewer. Goto scaling and and measure, I measure from ear to ear then add an inch maybe an inch and a half for padding, electronics. Good luck man, and for the sake of all that is good a pure read as much as you can, use the search bar and research...GM