Thanks! Are the Before/After Dinner sizes different with respect to measurements other than the darts? I wouldn't have expected that. Anyway, I have a decently broad chest, for how narrow my neck and waist are, so I usually err on going slightly up. American brands using vanity-sizing I tend to be a small, and brands that are more European or more precise (like, for instance, Gustin shirts) I'm a Medium slim, because I can get a decent amount of pull on that top button.
I guess I should also ask, what the lengths on monkey arms vs. non-monkey arms are. My arms aren't *super* long, but like I said, I usually wear a 33 sleeve. A size small in a lot of brands leaves the sleeves much too short, another reason why I'm often a medium.
I don't have measurements to compare with, but I am a 15-33 in BB ESF and wear a small AD. Small BD is a bit too slim for my liking at the chest and too constricting at the waist (I'm also not an athletic V shape either though). I tried a medium BD a while it fit OK, the neck opening was a bit bigger then I would have liked. Haven't tried one on in a while though as I personally prefer the breathing room the AD provides me better as I'm a bit over the super slim thing myself and only wear WvG untucked for casual gear anyway. Mauro measures his sleeve length from collar to sleeve hem though, not shoulder to cuff like most of us are familiar with so keep that in mind when you do see a measurement chart pop up.
I'm about 5'8" and the standard sleeve sizing is a bit on the short side (they wouldn't fly for me for wearing with a suit) by about an inch. Haven't ventured into monkey arms yet, but an extra inch in the standard sleeve length would be ideal.