I am a 5'11" male, skinny to athletic build and longer arms (usually have to buy a large long sleeve shirt so the sleeves are not too short) and the medium fits me very well. The jacket it warm and comfortable. I am ended up with the acid wash denim (looks more like midnight blue than it does denim) and it looks much better than I was expecting. I wanted the grey/cyan one but it was sold out. I am lucky because I saw this jacket on the slopes and the blue looks very strange almost like plastic, the denim is very nice and works well with any color snow pants although I would suggest a lighter color so you can be seen. I only wish that there was another pocket that would secure without coming loose for my pass/lift ticket/wallet via zipper or button. The only pocket that is this was is the media pocket and my wallet does not fit there. This jacket it priced very well at the full price and I would suggest this to a friend.