14mm round khaki and maroon Harry Potter marauder map charms sit inside round gold-plated bezels.  The earrings use gold-plated fishhook earwires and are 0.5" 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.