The Slim Princess.

Kalora is the "slim princess of Morevana," a land in which fat is prized. This distresses her family, who must marry off Kalora, before her rotund younger sister Papova may wed. To remedy this situation, Kalora's father, the governor general, throws a garden party and disguises his slim daughter in an inflated rubber suit. All goes well until the suit ruptures, deflating Kalora to her normal size....