How far should overcoat sleeves reach? Is there a reliable marker?
I agree that if your gloves are the right length your coat will end at the base of your wrist, which is where your shirt ends.The overcoat should finish at the same level of the shirt, not beyond it. Same wear argument, and the coat is supposed to keep away the worst of the possible things that could soil the clothes worn under your coat. I was taught that you shouldn't show any shirt cuff when wearing a coat - so make sure you have the right shirt sleeve length.
Plus your coat is not there to keep your hands warm, that's what gloves are for! Now American gloves are notoriously short - don't know the history of that one, and if I was faced with too short gloves, then I would want longer coat sleeves. So when you don't wear gloves, your coat wears prematurely, and it looks like you have borrowed your older, taller brother's coat. Thus the argument for the coat sleeve to finish the same as the shirt sleeve. One used to be able to tell an American, even a weel dressed one, by having too long suit sleeves. The Brits tended to have too short sleeves, showing a lot of cuff - had a few older clients come in with their Huntsman and Poole suits, and was informed that was their style back in the 70s.
As form follows function,assuming that your shirt cuff ends at the heel of your palm, your coat should end there also. In cold Midwestern winters, there needs to be an overlap between the glove and the coat cuff. There should be no exposed skin at the wrist when gloves are worn.The overcoat should finish at the same level of the shirt, not beyond it. Same wear argument, and the coat is supposed to keep away the worst of the possible things that could soil the clothes worn under your coat. I was taught that you shouldn't show any shirt cuff when wearing a coat - so make sure you have the right shirt sleeve length.