Chibi

Chibi (from Japanese "ちび", meaning small or child) or super-deformed is an artistic resource of manga/anime style that is mainly used to highlight comic or absurd situations, or to simplify explanations.

Also used to "minimize" or "simplify" a character in an RPG game, highlighting its most characteristic feature: the head.

Broadly
Whatever the character (usually the change is most noticeable in those with a teenage or adult body), the shape of the body resembles that of a baby. Let's see its characteristics:
 * Proportions: Very large head with respect to the body, similar to that of a baby.
 * Head: Round (almost spherical), large eyes, small nose and mouth. In general, very childish.
 * Body: Similar to the proportions of a baby, but the arms and legs are "pointy".
 * Details: Usually, all the details of the original characters are preserved, that is, the super-deformation is nothing more than a change in the physical proportions.
 * More smalls: The chibis are smaller than the original ones, they "shrink". For the Japanese, this aspect generates grace or laughter.

Method of deformation (tutorial)
The characteristics of the chibi style can be seen in the tutorial by Patrick Shettlesworth:

According to height (for adult humans)
The biology of the human alters the proportions according to their height, therefore, the higher have relatively smaller heads and the dwarfs seem to have large heads:

According to age (for humans)
While it is true that the dwarfs resemble the chibis, the truth is that the chibis rather want to resemble the babies:

Controversy
The chibi style not only deforms the characters, but also shrinks them. There is a whole controversy about this, since there are some who consider that the chibi theme does not imply the GTS theme, while others do consider it. Let's see some examples, do you think that there is GTS issue here?:

Giant chibis?
There are very few works where giant chibis are shown, this is because their natures are contradictory (the proportions of chibi remind us of that of the dwarves).

Poll
Do you consider that chibis are related to "size fanaticism"? YES NO