Our 14k gold filled pieces are waterproof, and our entire collection is hypoallergenic and nickel free—designed to keep up with you. MATERIAL: 14K GOLD FILLED OR STERLING SILVER 925 BEAD SIZE: CLASSIC 2MM + 3MM + 4MM + 5MM + 6MM + 7MM + 8MM STRETCHY SIZING: 7" Style Tonya solo or stack it with your favorites for a personalized, effortless look that lasts.