I'm 5'9", 150lbs. Where small to medium tops. Bought this in large to accommodate a sweater, dress jacket or suit coat (blazer). Though medium would have fit I chose to buy large. However, does not look large on me. It looks fabulous. Excellent design! Collar stays up when needed to block wind from blowing down back of my neck. Pockets not deep enough to keep hands warm; iPhone falls out of hand pockets - so beware if you put a smartphone in a pocket. Only one suggestion for design for BCBG please put 2 internal chest pockets on the inside this coat and all your coats for smart phone and sunglasses.
Lubbock, TX, USA