The fit on these is a little on the large side. In most brands if I get medium it is perfect in the waist, sometimes a tad bit snug, but the length NEVER fits me. I am 5'8" and about 135lbs. I have long legs and I went with medium in these rocker pants and they fit me PERFECT! I could not have asked for a more perfect fit.
I am in between medium and large, normally go to large to get length and wear a belt. I will not need to wear a belt with these and the length could not be more perfect. no high waters an no massively dragging pants.
They have polyfill insulation and that is awesome to help on cold days. The fabric moves well. Overall satisfied.