The earrings are 1.25" long antique brass skeleton key charms.  The earrings use antique brass fishhook earwires and they are 1.5" 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.