I bought two sizes - a medium and a large. I got the large first, and thought that the collar was really huge. So I ordered a medium to compare. The same issue – the collar is so big. I decided to measure it against an existing oversized denim jacket that I have. The collar is easily 3 inches longer on either side, which makes for an oddly cut neckline. I do like how oversized it is, and the medium was the better fit overall. I am 5‘7“, and I usually wear a size 6/medium on top. I’m not sure if I’m going to keep the medium jacket, because the collar just looks so giant.