If you are interested in learning how to print and build an entire Spider-Man 2099 suit, check these videos out. This is Part 1, covering the helmet. Subscribe for additional videos on an entire tutorial across this journey
Link to STL files
https://www.do3d.com/product-page/armored-spider-man-2099-white-suit-3d-model-project-5948
Link to Video - How To Scale Helmets
https://www.youtube.com/watch?v=1sHP7D5isFI&t=127s