I am 5'2", 110 lbs.  I read the other reviews and got a Medium instead of a Small, which was good.  However, the waist is tight and rises very high.  I am considering cutting the elastic of the waist, which for a pair of tights at this price point is a shame and shouldn't have to happen.  The tights are snug enough that I think they would stay up.  These cost enough, however, that I wish the waist were better made.  It is your typical 1 inch elastic covered with material that bunches.  Makes for an unattractive line.  Also, I do find the material kind of scratchy, with a sheen that is not all that fashionable.  It definitely seems more like dance-wear than fashion.  The gusset is great though.  Just want to warn shorter people about the high waist.  I read the reviews about the lower-waist version and stayed away, probably should have gone that route -- the waist might be more normal on a high waisted person.