I ordered my husband the size he usually buys for a coat, 48R, and it fit perfectly. He wears suits and it fit nicely over his suit jacket. He also loves the snap-out liner. The one thing we were not happy about is that this jacket is made in China! I hate buying stuff from China! With discounts/coupons we paid *** for this jacket so it was worth it but would not have bought this for the original ***.