These come plenty big and long, so don't worry about that! I usually have a hard time finding a long enough length in the arms, but these were fine. They aren't fitted in the waist/crotch, so it you're looking for fitted pants, these aren't it. I have worn them skiing, here in MN, and they have done an adequate job of keeping me warm. Not sure if I would use them for extreme cold, however.
I went skiing for 3 days in Jackson Hole, Wyoming (one of the coldest places I know of) in these and I've never been warmer. The are thick but not bulky and so soft! I am 5ft 3in, 120lbs and the small fit me perfectly!
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