Well I should have trusted the other reviews. I wear a large in other Mountain Hardwear items. This large jacket fit great everywhere but the sleeves. They seemed fine when I put it on but when I would move my arm they would ride up way too far. Unless you are a t-rex size way up for the sleeves.

This jacket is great...if you have short arms.
I went to a local retailer to try it on, but they didn't have the Lodown. I tried on other MH coats, down and synth, and a small fit me perfectly, so I bought it. When it showed up at my door, the arms were too short. I exchanged for a medium which I got today. While the arms were a little longer, they were still too short! I'm returning the medium and going to try a different coat.
Other than the sizing, the coat is great! Warm as hell, lightweight, and packs down super small!

I am 6' , 190 lbs. I usually wear a large in outerwear. In a dress shirt I wear 16/34.

This was just too short in the sleeves and I don't like the large floppy collar. Had to return it.

I bought this jacket in what I wear in the monkey man and boris jackets from MH so I assumed this would fit perfect in a med also. Well, it fit good in SOME places and bad in others. The sleeves were too short and the underarm seams chaffed my pits. The collar has a terrible, floppy, oversized design that lets heat dump out through your neck. However, the jacket will still keep you warm even with heat escaping out the collar, it has pit zips which are a great feature on a down jacket, and it doesn't look like your average down coat. If you are considering buying this jacket, I would size up.

The cons outweighed the pros for me and it was sent back as sizing up prob would have caused different issues.