Gray Pearl Planet Pendant Double Layer Choker NecklaceSize Sheet Product Details Chain length approx 45 cm with a 5 cm extension. 7 day no reason returns supported. Care instructions: avoid contact with chemicals (perfume, skincare, shower products), sweat and water; keep dry and clean; store in a sealed bag when not worn; avoid wearing while swimming, sleeping, during vigorous exercise, or wearing multiple metal accessories together; avoid friction. Size Chart Size Chain length Extension chain one_size