I had to buy 2 of them, the first one which was supposed for a medium size guy, was too big for him, so I ordered a small sized unit for him. The medium sized migrated to my eldest son, who is usually Large, still a little oversized but acceptable.I fit of the Men's Outdoor Sleeveless Stand Collar Fleece Lined Vest was too large.I dont like the big tag in the upper back other then that it's a good vestI've gotten lots of compliments, on this vest, but it does fit a little sung I'm only 5-9 225lbs I do workout, but still, even for an extra Large I figure a little more room would be great that's why I got the XL. it's not a horrible fit. must be a Europe thing because the zipper is on the opposite side compared to North American. I do enjoy it very muchI don't know what kind of body this was made for, but it's awkwardly shaped.I'm 6'4" 225lbs and the XL fits right. Maybe even a tad on the loose side so these run correct size or maybe even larger. I have read reviews of these fitting small. I dont see how unless the sizing has some variation in the manufacturing.Overall good vest.I like the style, the fit, and the length but unfortunately that's just it. This vest is just for show no warmth at allThis was way too large. I bought a medium for a guy who wears a medium in t-shirts. He has a thin build at 5'11" and 140 lbs, but doesn't have a problem wearing that size. The quality seems decent, as it holds a good shape and is a nice material, but even in a smaller size would probably be a bit too puffy on him. It's too bad because the lining is a good pattern and it seems like a solid vest for the price.