This is a 4-piece accessory set! Photo 3: Although unused, the leather strap of the key necklace is slightly twisted. Photo 4: This is an unused watch, but I have not confirmed if it works, so I don't know. Photo 5: The diameter is approximately 18cm. *Please note that these are amateur measurements. *It is not elastic, so it does not stretch. Although unused, these items have been stored at home, so please refrain from purchasing if you are concerned or sensitive about this. We would appreciate it if you would consider purchasing after understanding this. Thank you for looking! ♪