If you like it spooky, this full permission pack of 20 100% mesh skulls from Girl Not Included is for you. Each one has a PE of 2, and the set comes complete with samples and 14 included texture maps.
These skulls can be resized down to nano size, in order to create jewelry, items for petites and tinies, and any other teeny thing you might have in mind. Of course, they can also be sized up as well for large builds. The initial size is average human size.
You will need a mesh capable viewer to view these skulls properly.