We bought these shirts for our son in college. One zombie and one dinosaur. It arrived fast (within two days of placing the order). We order them on a Tuesday and they arrived on Thursday!! They are soft material and they have some wiggle room to be able to flip them over your head. My son worn them around campus and everyone loved the shirts and wanted to know where he got them from. The comments were always "I want one, where did you buy them from!?"  He was asked to flip the shirt over so they could see the figure inside of it. Everyone love it and had a good laugh as well. My so wears XL and XL was the right size. Some sizes run smaller or bigger, but these ones are just the regular size.