Her mass seems to be more in her boobs than anywhere else. She does have slightly chubby fingers, but her arms (forearms and biceps) seem to be pretty "normal" sized, not at all chubby or saggy. The little I can see of her waist and hips suggests that she is a bit thick there too.
All told though, she definitely wouldn't be thrown out of MY bed, whether she ate crackers in there or not. Rough estimate at her cup size: 44I.