The race model for the halfling is greatly out of proportion.
The best example for a halfling model is a small child with pointy ears.

Has anyone else noticed the weird looking halfling models? They look like pointy eared dwarves, or thick short elves.

Larian:

Please adjust the models to decrease their size by approximately 20%, their head size proportional to a reduced size of 20%. Just model them after a skinny toddler.

Please reference the player handbook, races.