These pants are a nice blend of jeans and leggings. They seem tight at first, but function quite well. I bought the vintage blue ones first - primarily used them for bouldering and decided to get another pair because they worked well.
At first, I was going to give 4 stars because sometimes the zipper comes undone, but it's really not enough to be severely annoying.
I'm 5'6, 120 lb - I got the size 26. Sometimes they feel a little loose in the waist, but I don't think sizing down would work because they are tight everywhere else.