Chain length approx 30 cm; extension chain approx 5 cm. Keep dry and clean. When not wearing, store separately in a sealed bag. Avoid contact with chemicals (perfume, skincare products, shower gel, etc.), avoid wearing during vigorous exercise or swimming. Avoid wearing multiple metal accessories at the same time and avoid friction. Do not wear while sleeping. Note: product measurements are taken by hand and may have slight deviations; actual product prevails.