I bought these in a medium based on the other reviews.  I am almost 5'7", 125 lbs and find them to be a bit big.  I have not tried these in a small, so the medium might be the right size for me after all, but they definitely do NOT run small.  I am guessing that the other reviewers like their clothes very baggy.  Compared to the model, these hang off of me a little bit more than the picture.  Now, I have not washed them, but I don't anticipate a problem since I wash clothes in cold water and do not use the dryer.  The length is long, exactly as shown in the picture...which I prefer over flood-length.  These are cute pants, but if you like a clean fit like me, ignore the reviews and order what you would normally order in a junior-size pant!