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