The ring size standard table used in different countries and regions is different, and the mainland version, Hong Kong version and American version are used more in China at present.
1. In the Hong Kong version, ring No.8 has a diameter of 14.8mm and a circumference of 48mm.
2. In the mainland version, the ring No. 8 has a diameter of 15.3mm and a circumference of 48mm.
According to the principle of thermal expansion and cold contraction, because the weather is colder, the finger is one to half smaller than the summer, and the winter and summer rings are one to half less. Buy a ring in winter, the ring can be rotated around but not easy to fall off after wearing it.