Charisma simplex is a species of extremely small sea snail, a marine gastropod mollusk belonging to the family Trochidae, commonly known as top snails.

[1] The height of the shell is 1 mm.

The shell is a "depressed turbinate" and has a complete peristome.

[2] This marine species is endemic to Australia, specifically found in the coastal waters off New South Wales.

This Trochidae-related article is a stub.