Our best selling lightning stud goes mini. Featuring a threaded flat back, this is the perfect dainty addition to your ear party to leave in and never take out. Want to change this earring to a butterfly back? Fill out this form here. Length: 8mm, Width: 2.5mm 18 Gauge Solid 14K Gold, nickel free and hypoallergenic, Diamonds Kimberley Certified Diamonds (Conflict Free) Single Earring