A trifecta: the luxury of gold, the durability of titanium, and the sparkle of marquise CZs in one crawler barbell stud. Made in responsibly sourced 14K hollow yellow gold and hypoallergenic polished titanium that's both lightweight and durable. Stone Type: Cubic Zirconia Stone Size: 4 x 2 mm, 3 x 1.5 mm, 3.5 x 2 mm Gauge: 18 Tube Length: 5/16" Height x Width: 5 x 11.2 mm Fits cartilage piercings: helix, forward helix, tragus, conch and flat.