Our antique bronze tree of life charms with a verdigris patina are nickel, cadmium and lead-free zinc alloy. The charms measure 15mm wide and 18mm tall (with the integral hanging loop). The hole in the loop is approximately 2mm in diameter.
These are sold in packages of 25 charms.
From Wikipedia: "The concept of a tree of life has been used in science, religion, philosophy, and mythology. A tree of life is a common motif in various world theologies, mythologies, and philosophies. A mystical concept alluding to the interconnection of all life on our planet; and a metaphor for common descent in the evolutionary sense. The term tree of life may also be used as a synonym for sacred tree"