Does not run big
I don't know why multiple reviews say this runs big. It doesn't. I'm 6 ft, 230 lbs, but a natural, athletic build. I've got muscle and decent sized chest, but I'm not overly muscular, I don't have any fat around my stomach or waist at all, and the length was exactly waist length, so if I lift my arms up, my belly button is uncovered. If I stand regular, it's a good fit, and would be more on the tight side. If I leave it open, great fit, if I button it up, I look almost buff. If it's buttoned up I can, just barely, touch my right hand over to my left shoulder and vice versa. Tailored fit. But people saying it runs big must be pretty skinny, because I felt the exact opposite; that is, if anything it was fitted or slightly tight. If you're a gym guy (not a creatine head), either this will be fitted for you, or I would recommend a size up. I got a medium, and that's fine, but if I got it again, I'd get a large. The ONLY reason I give this 4 stars is because the lining is 100% polyester. If I'm buying a product made of natural materials, like goat skin, I don't want synthetic materials like polyester, especially not the lining. But it is a very nice jacket, and much appreciated.