Earrings are jewelry attached to the ear. The material can be of metal, plastic, glass, precious stones, beads, and others. Said earring commonly used to refer to some kind of actual ear jewelery of different types:

Earrings are the pendants that hang on the ear lobe.
Subang is a jewelry ear shape is round and flat.
Earring studs are small in size.
Kerabu is thin earring made of gold.

Ancient times in many places in the world who wear earrings can be male or female. But now we use a norm that comes from the west, where the earring is worn jewelry for women.