Body Candy Stainless Steel 5mm Synthetic White Opal Cartilage Earring 18 Gauge 5/16" Gauge size 18 gauge; 1 millimeter 5/16 inch; 8 millimeter barbell length 316L stainless steel straight barbell for cartilage piercings Earring features 5 millimeter white synthetic opal accent Body jewelry stud earring for cartilage, tragus, and multiple piercings