Snake chain herringbone bracelet, flat chain bracelet, 18k gold filled stacking layering bracelet, waterproof, tarnish-resistant, gold-fill. Chain Thickness: 3mm, 4mm or 5mm thick. This beautiful flat chain is a must-have for every layering look! Wear it stacked with more bracelets from the collection or "solo" for a minimalist look. 18K gold filled measures 6”long 1.5" extension.