Alternate the ball stud and pink CZ bone-style studs as your style changes, or wear the retainer for work or sports. Made in responsibly sourced 14K semi-solid and hollow yellow gold for everyday wear. Stone: Cubic Zirconia Stone Size: 3 mm Tube Length: 1/4" Gauge: 20 Height x Width: 2 x 2 mm; 3 x 3 mm Fits nose piercings.