The information in this article is from a fan game or fan fiction and is therefore not canon.
Halflings are found in King's Quest ZZT series. Alexander encountered the halfling thief Ansil several times during his adventures.
Halflings are very small and rapid humanoid creatures. Because of their incredible speed and their small size, they are often trained in the art of thievery, and become high-level thieves. Therefore, most of them aren't regarded as friends by the other races of the world. Halflings are on average three feet tall.