Permanently Locking Sterling Silver Teddy Bear O Ring Collar, a cute and delicate day collar This day collar has a locking link in place of a traditional clasp, allowing it to be permanently closed. See guide for instructions on how to close and lock the link. Once it is locked the only way to remove the collar is to cut it off, in an emergency a pair of sturdy nail clippers will cut through either the chain or the locking link itself Simple measuring guide available here Comes with free high-quality silver polishing cloth to help keep your collar in pristine condition. Materials: 925 Sterling silverDimensions:Ring – 1.8mm thick and 10mm diameterTeddy Bear - 12 x 6mmChain link size - 1.7 x 2mm (Belcher)Your necklace will be sent in the presentation gift box shown in the photographs, ideal for safe storage or as gift