It is Midgarddweller's depiction of Cernunnos - The Horned One.
The writing in the background is called ogham, it's primarily used for writing in early irish/britain languages.
 
It says:
“bí dílis duit féin ceart dom ceart duit
ni thugann aon rud ach seal - be true
to yourself live and let live nothing
lasts forever.”

Specs
Made from solid bronze or can be made of silver
Length is 2.32 inches or 5.9cm
Width is 1.18 inches or 3cm