Small Star Trek com badge charms hang from a 4" long ear thread.  You merely thread the end piece through your ear piercing pulling as much through as you want to allow these earrings to hang up to 3.75" 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.