I am between sizes, 47 inch chest, 5'9 200lbs. I lost 25lbs from an injury so I'm sure it will fit even better when I build back some muscle. I had the full zip version and it was way too big for me. The arms and the torso length were way too long! It looked like I was wearing my big brothers sweater. Now, The 1/2 zip is almost perfect. Very warm! The torso is still a little long, but it will be just what I wanted. My only complaint is the chest pocket is a bit small. It's difficult to get my hand in the pocket. I wish they would have used the same size pocket as the full zip version, the chest pocket on the full zip is the perfect size. The other thing I would have liked is zippers on the kangaroo pouch, the hoodie 1/2 zip has no zippers :( but it will be alright, I'm happy with the purchase .