I just got an overcoat from indochino http://www.indochino.com/product/The-Essential-Charcoal-Topcoat. I have two questions about overcoat fit:
1) When putting it on over a suit jacket, I find the sleeves tight enough that the suit jacket sleeves slightly bunch up inside. How snug should the sleeves be?
2) I found the armholes to be fairly low. If I request a remake for higher armholes, will it be impossible to wear this overcoat over a suit jacket with low armholes? I have some older jackets which (unfortunately) have low armholes, and I wouldn't want to be unable to wear them at all with this jacket.
The sleeves shouldn't bunch up in the overcoat. Either the overcoat sleeves are too slim, or the suit jacket sleeves are too big. An overcoat (made to go over a suit jacket) is not going to have very high arm holes. You should still have movement and shouldn't be as low as a 80s-90s suit. But should be low enough to fit a suit in it.