Size: 4.4 x 3.7mm Chain length: Approximately 40cm *Please note that there may be slight variations due to amateur measurements. Please understand that this item is a pre-owned item with minor scratches from aging, and is stored at home. We kindly ask for your understanding before purchasing. In addition, we will basically use recycled materials for packaging from an eco-friendly perspective. Color Stone September Birthstone Material: SV925