The ring size range in China is 4-26, the ring size range in Europe is 44-61, and the ring size range in the United States is 5-12. Therefore, the ring size 21 belongs to the size of China. Please check the ring size comparison table in Chinese Mainland or Hong Kong.
Mainland version ring size comparison chart
According to the table below, the circumference of the mainland version corresponding to ring 21 is 61mm, which is 6.1 centimeters; The diameter is 19.4mm, which is 1.94 centimeters.
Hong Kong Ring Size Comparison Table
As shown in the table below,
Ring 21
