I have bought this coat from Zara:
www.zara.com/uk/en/woman/coats/duffle-coat-with-fur-hood-c269183p1485071.html
I am a size 12 (with boobs) and I got both the M and L to try at home. The M looks better but is a bit tight over the bust and shoulders. The L feels better but does look a bit big especially over the hips.
I know it's difficult to say without a photo, but which size should I go for? It's a bit depressing being a L when I'm only a size 12! But it's not that so much, more so that it looks big.