What size barbell is used for nipple piercings?
Nipple piercings most commonly use a 14 gauge (1.6mm) barbell. Initial piercing length typically ranges from 5/8 inch (16mm) to 3/4 inch (19mm) to allow for swelling. After healing, the barbell is often downsized to a shorter length, commonly 9/16 inch (14mm) or 5/8 inch (16mm), for a snug and comfortable fit.