I bought the jacket in size M, black. I am 5'10", 145lbs. So taller and on the leaner side. The fit is very good. In fact, it is probably a 5 star for most, I just like my sleeve a tad longer and the back waist a tad longer- but I would not want the overall fit of large. I have worn this about 10 days straight with another ten or more expected on a trip I am on in the Hebrides. So function is superb. Thickness is just heavy enough, but not overly bulky. I am wearing it over a thin wool layer and under a Patagonia Puff jacket. So this is a perfect part of that system. I really should give it 5 stars but I can still imagine it better. I rarely give a product 5 stars. I would buy another if I needed it, especially if I lived here in the Isles. It is great on no smell, and great comfort. Hope this helps!