The size of the ceramic ring is 38.8*32*1*1mm for the flat plate. Suitable for 1000m quartz tuna SBBN013, SBBN025, SBBN027, SBBN029, SBBN040, SBBN051, replace the original film chronograph bezel, and the 1000m quartz tuna steel bezel from our store can also be used. Please measure the size before buying. If you buy incorrectly, the round-trip express shipping fee will be at your expense. The scale is filled with Japanese luminous material, and the brightness is acceptable. A piece of double-sided tape will be provided. If you have any questions, please contact us. Watches and bezels are not for sale. They are for display only.