1mm thick 18K gold plated on solid sterling silver 925 Italian Omega chain necklace spring ring clasp - inch 12"/30cm, 14"/35cm, 16"/40cm, 18"/45cm, 20"/50cm, 22"/55cm, 24"/60cm Made in Italy 925 Sterling Silver 18K Gold Plated Available lengths include: 30cm; 35cm; 40cm; 45cm; 50cm; 55cm; 60cm Gift Boxed