Solid 14k Yellow Gold 1.5mm (0.015 cttw) Genuine Green Diamond Nose Stud Bone 18 Gauge 1/4" Gauge size 18 gauge; 1 millimeter Length 1/4 inch; 6 millimeters Nose stud with 0.015 cttw natural green diamond in a prong setting Solid 14k yellow gold nose ring with polished finish Straight nose bone can be worn in either nostril