Great style, awkward sizing, buy one size up
"This is by far my favorite H Bar C shirt style. . . versatile, never dull, and works for every occasion. My only issue is the fit. I’m a very average Medium (ideally size 40), but the Medium fits like a snug in the forearms and chest feels like a 38 (not quite 40). I bought the Large and it fits much better like a relaxed 42-ish, ideal for an untucked, informal look. At this price, I wish the sizing development were more meticulous to avoid buying twice like I did with the Calamity Jacket."