I'm 5'3" and 115-120 pounds, I wear a size 2 short in almost all other pant brands (Banana republic, express, lucky, etc) and went with the 2 short with this brand; fit like a glove.  They are mid to low waisted, which I prefer, and the fit is incredibly flattering.  I bought them for hiking but now wear them pretty much anywhere and bought a second pair in a different color.  They do great for hiking by the way.