Earrings are currently a useless item, and often considered as junk.
Earrings are a jewelry item and have no use, being added purely for the purpose of clutter, creating more realism for the player when looting.
Earrings can be found on corpses, in purses and in some stores.
From newitems.txt (Project Zomboid directory/media/scripts/)
Weight = 0.1,
Type = Normal,
DisplayName = Earrings,
Icon = Earrings,
MetalValue = 25,