I love Mary Blair's color sketches of Alice. Her chubby arms and legs feel very doll like. I wonder how likable and identifiable this stylized Alice might have been in animation.
David Hall's earlier development work on the character show a skinny and more realistic looking girl.
These stick like legs create a graphic contrast to the bulky blue dress.
Add Kathryn Beaumont's performance and Milt Kahl's draughtsmanship and you get the final, approved look for the title character in Alice in Wonderland.