My wife ordered both size M and L, and size L fits her much better, even though she always orders M. That’s what she said: “Size M runs small, size L fits an average person of size 7-9 or 8-10. My advice is to buy one size up from your usual size, and they will still fit snuggly. The pants look OK, the wide waistband tucks everything in very nicely, the stretch of pants is pretty decent, it’s not too hard to put them on if you get one size bigger, but perhaps it needs some wiggling into it. They do smell strongly when you first open the package but I aired them for 1-2 days and the smell went away. One thing that is really bothersome is that they do not breathe at all – I danced in them for 30-45 minutes and I felt hotter and hotter in them and the pants were completely soaked inside from sweating, they didn’t dry out right away, I had to rinse them out when I got home. I wish I could give it 5 stars because they actually seem OK but due to the too small sizing, the smell and not breathing, I’m giving it 3 stars.”