Here's a stark realization about how Disney draws their princess characters out: they make their eyes bigger than their stomachs! So how realistic is this? How about not-at-all! Here's seeing the differences between eyes and stomachs of each character:

Elsa from Frozen

Anna from Frozen

Rapunzel from Tangled

Tiana from The Princess and the Frog

Ariel from The Little Mermaid

Jasmine from Aladdin

Belle from Beauty and the Beast

Pocahontas from Pocahontas

Aurora from Sleeping Beauty

Mulan from Mulan

Meg from Hercules