Missing the most crucial piece to your Iron Man suit, the Iron Man helmet? This is the Head (Regular), part 1 of 3 parts that you will have to order separately for a complete helmet. Still not sure if it will fit? The rim around the bottom of the helmet can be trimmed away an additional 7mm, for a total opening width of 152mm. Additional parts you will need to order are; Iron Man Face Shield (Regular) and Jaw (Regular). The way you attach them is up to you, (magnets, hinges, clips). Designed to print at a thickness of .72mm, (minimum for Strong Flexible Plastic is .7mm). This saves on printing costs and WILL need some reinforcement on your end. Most people use fiberglass resin. WARNING: Please take measurements before ordering to be sure the helmet will fit, I can't guarantee that this will fit everybody even though it is considered a large. Measure the width of your head compared to the width of the opening at the bottom of the helmet.