Saks Fifth Grade is a clothing store for girls located at the Springfield Mall.
Lisa visited the shop, hoping to find a different outfit that would make her look thinner. Unfortunately, she only found clothes with size 0 and below. She then saw a very thin girl model on TV who was "back to her birth weight". When Lisa looked at herself in the mirror, she realized that she didn't look so bad, but then imagined herself as a fat girl who had to date with Milhouse.