I purchased this on Rakuten Ichiba. Surgical stainless steel necklace set of 3 Length (including clasp): Approximately 42cm - 45cm Material (including clasp): Strong against metal allergies Set of 3 medical-grade surgical stainless steel necklaces Surgical stainless steel is a material different from general stainless steel, and is a general term for special stainless steel used in medical settings. It rarely causes metal allergies and is resistant to scratches and discoloration from oxidation, so it has recently begun to be used by both men and women, making it a注目 (chūmoku - attention-grabbing) new material. Please try it, especially if you are prone to allergies and enjoy fashion, regardless of whether you are male or female! Please understand that this item has been stored by a private individual, and no claims or returns are accepted.