mini person
A person that is extraordinarily small in size compared to their surroundings. Their small stature could be established against a humongous environment, or with normal sized characters.
If you can distinguish the gender of the small person, tag them as minigirl or miniboy.
Non-living dolls aren't considered minipeople.
For a ordinary sized character and a miniperson in the same image, use size difference. If the larger character is holding the miniperson, use holding mini person or in palm.
See also
The following tags implicate this tag: holding_mini_person, miniboy, and minigirl (learn more).