If she's supposed to represent the notion that women can be attractive regardless of body type, that's a fabricated fallacy. She's just as much a model as any of the other barbie dolls, even if she's a jean size or two bigger than the rest of the fleet.
She's attractive, there's no denying that, but it's unhealthy when a society as a whole sets the standard so high. Focusing so wholly on physical appearance over any other aspect of femininity is wrong, and causes many men to ultimately lose out on a whole lot of love.