Body Candy Steel 3mm Synthetic Blue Opal Internally Threaded Tragus Cartilage Earring 16 Gauge 5/16" Gauge size 16 gauge; 1.2 millimeters 5/16 inch; 8 millimeter barbell length 316L stainless steel internally threaded straight barbell for cartilage piercing Tragus earring features 3 millimeter blue synthetic opal ball end Body jewelry stud earring for cartilage, tragus, and multiple piercings