The ring size range in China is 4-26, in Europe it is 44-61, and in the US it is 5-12. Therefore, ring size 25 belongs to the size range of Chinese rings,
Please check the ring size comparison table of Chinese Mainland or Hong Kong version.
Mainland version ring size comparison chart
According to the table below, the circumference of the mainland version corresponding to ring number 25 is 6.5 centimeters, which is 65mm; The diameter is 2.04 centimeters, which is 20.4mm.
Hong Kong Ring Size Comparison Table
According to the table below, the circumference of the Hong Kong version corresponding to ring 25 is 6.7 centimeters, which is 67mm; The diameter is 2.08 centimeters, which is 20.8mm.