Materials: Gold Plated Stainless Steel Measurements: 18" / 45 cm plus 2” / 5 cm extender chain, pendant 18 mm Weight: 7 gm Why you should love stainless steel: • Waterproof • Hypoallergenic • Non-reactive to sweat, salt & chlorinated water • Rust, corrosion & scratch resistant - it still can be dented, though! • It's a planet friendly product - 100% Recyclable! End result? Sleep, swim and go to work with it. Wash, rinse, repeat. We love it. And so will you. Caring for it: Wash with a little soap and water.