This standard stipulates the definition, measurement, naming and marking of the ring size. This standard applies to the measurement and designation of the ring size.
GB/T 11888-2014 history
2021GB/T 11888-2021 Jewellery—Ring-size—Definition, measurement and designation
2014GB/T 11888-2014 Jewellery.Ring-size.Definition,measurement and designation
2001GB/T 11888-2001 Jewellery--Ring-size--Definition, measurement and designation