HEART CUBIC ZIRCONIA STUD EARRINGS -12 pairs heart shape CZ stud earrings in different colors for your more selections; 18K yellow gold plating over surgical stainless steel to ensure the color a long time lasting SURGICAL STEEL STUD EARRINGS- Crafted with surgical stainless steel which is nickel free and lead free, you don't have to worry about green coloration or irritation COLORED STUD EARRINGS SET - you can get 12 multicolors stud earrings from one order, 12 months birthstone collection will match to your different occasion and dressing SIZE- This birthstone CZ stud earring set with size options of 3mm, 4mm and 5mm; stainless steel post earrings' length is all in 10mm, thickness is 0.8 mm (20G).