I'm normally a 42R (33 waist, 42 chest, and 5'8") and the 40R was WAY TOO BIG. I wanted this to fit soo bad, it's a nice coat. But everything about it is LARGE with a lot of extra fabric in the shoulders and stomach areas! I know it's meant to be worn over a suit, but seriously I look like a kid trying on his dad's formal wear. But good coat, just buy 2-3 sizes smaller...trust me!