I guess if you want the authentic WWII bomber pilot feel, where the leather and fur are rough, tough and rugged, then this is for you. I got the medium and it was too tight for me. I'm 5'9" 175lbs, average build. I think proportion wise, the bigger sizes probably look better if you're 6 feet or taller. On a comfort level, it's just too rugged for my taste.
I ended getting a size 38 of the soft, stylish and luxurious STYLE # 14227.