Body Candy Solid 14k Yellow Gold 2mm Blue Synthetic Opal Left Nose Stud Screw 20 Gauge 1/4" Gauge size 20 gauge; .8 millimeters Length 1/4 inch; 6 millimeters Nose stud with blue synthetic opal in bezel setting Solid 14k yellow gold nose ring with polished finish Nose screw designed for use in left nostril