The circumference of a 5cm ring is 50mm. Currently, there are four mainstream ring size standards in the market: Hong Kong version ring size, mainland version ring size, American version ring size, and European version ring size. They all have rings with a circumference of 50mm, and the specific selection needs to be based on the comparison table used by the store.
Mainland version ring size comparison chart
According to the table below, the ring with a circumference of 50mm corresponds to mainland sizes 10-11 and a diameter of 15.9mm.
Hong Kong Ring Size Comparison Table
According to the table below, the ring with a circumference of 50mm corresponds to the Hong Kong version number 10 and a diameter of 16.1mm.
US Ring Size Comparison Table
According to the table below, the ring with a circumference of 50mm corresponds to a US size of around 6 and a diameter of 16.5mm.
European Ring Size Comparison Table
According to the table below, the ring with a circumference of 50m corresponds to the European size 50 and a diameter of 15.92mm.
