※ Please do not comment before purchasing, such as "Can I buy this at ○○cm?" If you are buying a single item, please purchase it without commenting. We often miss comments, and many people only comment and don't buy. Thank you for your understanding. However, please be sure to inform us of the length after your purchase. This is a chain necklace made of surgical stainless steel. It's a classic ball chain. The ball necklace chain, made of many connected beads, is a standard chain that suits any pendant top, regardless of whether it's for men or women. The clasp of this chain is a tubular connector type, also known from dog tags, making it simple, durable, and less prone to breakage. It's easy to thread through pendants, and you can adjust the length by cutting it with nippers, making it very user-friendly. It's medical-grade stainless steel, gentle on the body and designed to minimize allergic reactions. This material is recommended for those who cannot use silver accessories due to metal allergies. It's a metal that is unlikely to discolor, so it doesn't require polishing or other maintenance, making it very easy to enjoy. ※ In rare cases, it may not suit your skin. If this happens, please discontinue use immediately. This product allows you to choose the length up to 90cm. We accept orders in 1cm increments, so please specify your desired length when you purchase. ※ However, please note that there may be slight variations. Please note that we do not accept width specifications, as the width is only as stated. Thank you for your understanding. ■ Chain width and thickness: Approximately 2.0mm wide x 2.0mm thick ■ Material (including clasp): Medical-grade surgical stainless steel, resistant to metal allergies