Bob Flynn - same on blooskyさんのイラストまとめ

How design choices like height and face shape weigh is all about the surrounding characters and environment. Their age is easier to specify by comparison.

Satsuki (11), Mei (4)
— drawings by Miyazaki

hat-tip to the artist responsible for this drawing 👏
from: 'Falling For It', newly released on HBOmax

@gmcalpin two more examples: (Flash)

8-year-old tree (2012)

You can also look to Sanrio: Tuxedo Sam (1979), Zashikibuta (1984), and Pochacco (1989). Not as stylized and digital as the above Kirby example at the top of this thread, but on its way there.

A vertical pan — desert campfire.
(left: my design; right: a more colorful punch added by the crew)

Pretty sure this is my first TV animation credit in 'background design'. I got to plan out design diagonal pans like this!

A couple screen-caps to get you curious.
Go watch!