Length measurements are always from the bottom of the collar. The idea of a 42R guy wearing this in XS makes me sad. It is just not how it is supposed to fit. If someone wants a slim fitting cardigan, there are places to get that. This is the opposite. It fits like a last layer - I actually don't think I've ever buttoned more than 1 or 2 buttons on mine, most of the time I wear it open.
So, folks, if this is not your jam, that's cool. But don't size down 3 sizes please
I envision using mine while sitting on the porch, after a day of hard downhill skiing, with a cigar and a glass of bourbon or whiskey. Going over New Years, can't wait. Also can't wait for it to get here.