I've been playing a lot with copper lately, and these little guys have also become a favourite to make.
 
111 hand forges the rings and even makes little copper rivets to keep the circle enclosed. Then I use annealed copper wire to create the tree of life. 
-Alli
 
Measurements:
Diameter: Approx 1.5" (3.8 cm)
 
Includes cord to wear the pendant as a necklace.