This curved CZ crawler barbell stud combines the luxury of gold with the durability of titanium. Made in responsibly sourced 14K hollow yellow gold and hypoallergenic polished titanium that's both lightweight and durable. Stone: Cubic Zirconia Stone Size: 1.25 mm Gauge: 18 Tube Length: 5/16" Height x Width: 13.31 x 2.97 mm Fits cartilage piercings: helix, forward helix, tragus, conch and flat.