A ring with a diameter of 18mm means that the inner diameter of the ring is 18mm. Currently, the mainstream ring size standards on the market are divided into four types: mainland ring size, Hong Kong ring size, American ring size, and European ring size. They all have rings with a diameter of 18mm, 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 diameter of 18mm corresponds to the mainland version size 17, with a circumference of approximately 57mm.
Hong Kong Ring Size Comparison Table
According to the table below
know
The diameter is
18mm
US Ring Size Comparison Table
According to the table below
know
The ring with a diameter of 18mm corresponds to a US size of around 8 and a circumference of around 56.9mm.
European Ring Size Comparison Table
According to the table below
know
The ring with a diameter of 18mm corresponds to the European size 57, with a circumference of 57mm.
