The size is approximately 4cm high x 4.1cm wide x 6.8cm thick. It comes with a rubber string. This item is from about 15 years ago. It was immediately placed in a garment case and carefully stored for a long period of time. Although it is unused, please consider purchasing if you understand that it has been stored at home for a long time and has been inspected by a non-professional! #tantan1911 (260)