With Columbia, I can usually wear between a 10 or a 12, and after reading reviews I ordered these in a 12.  Love the soft flexible fabric... it's very lightweight and breathable. They fit fine in the legs - attractive, slim fit without being too snug. The waist also fit fine while standing, but had NO give at all - meaning if you bent or twisted (as you might during a hike or trail run) - they would just be too tight.  Odd for Columbia. Had to return and will continue my search for comfy long shorts.