I can't recommend
against any of those $59.99 button-down shirts "for Adults" strongly enough. I've purchased a Star Wars one, an Orange Bird one, and a 50th Anniversary one so I'm confident saying that this problem is universal. Disney couldn't decide if they wanted to do a straight (no pun intended) cut like a traditional men's shirt or a curvy cut like a traditional women's shirt, so they tried to split the baby and do this half-executed flare thing on the bottom that doesn't look good on anyone. The sizing is also screwed up, about a half size smaller than what you'd expect from a men's shirt.
Cc
@uncle jimmy