I ordered 2 different sizes since I was unsure. I usually don't buy pants online because I like to try them on to make sure they fit first. Medium was recommended for me, but I bought a large as well. It's a good thing I did, because, even though the medium fit, it was a little too tight for my preference, but the large fit perfectly. (Regular height). For reference, I'm 5' 6' and about 170 lb.
Rating: [5 of 5 Stars!]