Body Candy Steel Blue Synthetic Opal Butterfly Right Cartilage Earring 16 Gauge 1/4" Gauge size 16 gauge; 1.2 millimeters 316L stainless steel straight barbell for ear piercing Post length 1/4 inch; 6 millimeters This cartilage earring can also be used for a tragus piercing Tragus stud earring with blue synthetic opal butterfly charm