I purchased this at the Aichi Expo and have kept it in storage. It is approximately 10cm in length. The tag and ball chain have deteriorated. There are also areas where the adhesive is weakening. Please understand that there may be stains, scratches, and peeling due to aging before purchasing. I will ship via Mercari delivery service. Please purchase if you understand that this item has been stored at home for a long time. Please refrain from purchasing if you are concerned about minor details.