Five years ago, such a levelheaded question would have drawn pitchforks and mobs here on SF!
@chrispy650 it definitely looks slim -- slimmer than I like. The pulling on the bottom button is telling. If I were you, I'd take out the back darts. A very close look will probably reveal stitch lines once they're out, but on a pattern like that it'll likely be nigh impossible to see.
Just got back from a warm sandy beach where I wore my old Liberty chrysanthemum shirt almost every day. What a shirt!