This is the third pair I have purchased from this line.  The fit over my muff top and they stay UP.  Which is really nice.  I don't have to wear a belt because they stay up all day.  They fit true to size, I am a size 10.  I have ordered the 10 Medium and 10 Short and both stay up (they do not fall on my behind either).  The look really good and slenderize my legs, which I love.  So worth the $$