I love these pants
The Monterosa pants are pretty stellar for any kind of winter activity. I've used them mostly for mountaineering and ice and mixed climbing. My measurements are 27" waist, 37" hips, 5'7", and a small fits perfectly. They're warm and fairly breathable, but more importantly, pretty much waterproof. I never bring hardshell pants climbing anymore, because these pants are plenty waterproof. They have an internal gaiter which I initially thought I would never use, but it turns out I use this exclusively now, and never use separate gaiters because the internal ones work so well.