The ring size range in China is 4-26, in Europe it is 44-61, and in the United States it is 5-12. Therefore, size 8 belongs to either China or the United States, and you need to refer to the comparison table of ring sizes in China or the United States.
Mainland version ring size comparison chart
According to the table below, the circumference of the mainland version corresponding to ring No. 8 is 4.8 centimeters, which is 48mm; The diameter is 1.53 centimeters, which is 15.3mm.
Hong Kong Ring Size Comparison Table
According to the table below, the circumference of the Hong Kong version corresponding to ring No. 8 is 4.8 centimeters, which is 48mm; The diameter is 1.48 centimeters, which is 14.8mm.
US Ring Size Comparison Table
According to the table below, the circumference of the American version corresponding to ring No. 8 is 5.69 centimeters, which is 56.9mm; The diameter is 1.81 centimeters, which is 18.1mm.