Stack these solid 14k gold discs for the ultimate minimalist look. Our threadless flat back studs are so comfortable you won't even feel them and so secure that you'll never lose one either. Item Details Material: 14k solid recycled gold Size: 2 / 2.5 / 3 / 4 / 5mm Flat Backing: 1mm diameter (18GA) Flat Backing Length: 7mm Sold as a single or pair Our 14k solid gold pieces are made to last forever. 14k gold will not oxidize or discolor, so you can wear your jewelry every day, everywhere.