Mary-kate is 80lbs and 5ft2 but when she was younger like in getting there she was 100lbs Ashley is 84lbs and 5ft3 but when she was younger like in getting there she was 107lbs But there settled...
The average classic twin mattress weighs approximately 20-30 pounds. A thicker, dense mattress like a temperpedic weighs more, approximately 30-60 pounds.