4mm, 8mm, and 10mm black crystal rondelles and rounds are put together with a bronze key charm on one earring and the bronze lock charm on the other.  The charms are 0.5" long.  The earrings use stainless steel fishhook earwires and are 2" long.  
 
All metal used is hypoallergenic, nickel-free, and is sterling silver, silver or gold plated or stainless steel unless noted otherwise. Every item is handcrafted, custom made, nothing mass-produced.