I liked the look of this jacket, but I was unsure of my size on the Port Authority size chart because I was right on the border. I usually wear a XXL, but I knew I'd be wearing other clothes under this so I went with XXXL and it's right on the money, even a bit more close-fitting than I expected but looks and fits great. If you're unsure of size, go up. It won't be huge or oversized.