Spyder’s sizing chart is good reference. I’m 5’ 10” 165 lbs, 32-33 waist, 30 inseam, and typically wear medium everything. So I ordered small (nervously). Thank goodness I did. They are on the smaller side of 33, but inseam is perfect. Regular fit is nice and straight legged with room for a thin under layer. Bottoms have good room. Material is very nice and soft and insulation isn’t bulky. Best looking and fitting ski pants I’ve ever owned. Can’t wait to head up to the mountains this weekend.