- Made of 18k gold plated, hypoallergenic, Lead-free, Nickel-free, it is a good choice for sensitive ears. 18k gold plated hoop earrings, sparkling AAA cubic zirconia, high polish make it delicate and shining. The inner diameter of the cubic zirconia small hoop earring is 10mm (0.39 inch) /12mm (0.47 inch)/14mm (0.5 inch ). Different sizes are suitable for Multi-Purpose using in daily life.