Definitely runs small. I'm 6'5 320lbs and wear a 52 long sports coat with plenty of wiggle room daily. I run an xl -xxl on dc, Hurley t-shirts. Not so much in this jacket. Was tight to zipper and was short, like belly shirt short. Also, the middle button on the back for the hood immediately fell off. I'll be getting an xxxl but hopefully it won't have the same immediate issue with the button.
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