Materials: 14k gold plated stainless steel Measurements: 11.8"/300 mm in length, plus 2.8"/ 70mm extension chain Waterproof: This item is waterproof and tarnish-free, making it ideal for daily wear. You can confidently wear it while showering, swimming, or simply going about your day. Shipping & returns: It takes about 15~30 days to create your jewelry pieces and 10 days to ship; customized items cannot be returned unless it is defective or damaged. And this item will be shipped separately if you have other non-customized products in your order.