Solid 14k Yellow Gold 1.5mm Genuine Emerald Nose Stud Bone 20 Gauge 1/4" Gauge size 20 gauge; .8 millimeters Length 1/4 inch; 6 millimeters Nose stud with natural emerald in a prong setting Solid 14k yellow gold nose ring with polished finish Straight nose bone can be worn in either nostril