The ring size standard table used in different countries and regions is different, and the mainland version and Hong Kong version are currently used more in China.
First, what is the inner diameter of the ring 18mm
The inner diameter of the ring is 18mm, that is, the diameter of 18mm. In the Hong Kong version, the circumference corresponding to the ring diameter of 18mm is 60mm and the ring number is 18. In the mainland version, the ring diameter of 18mm corresponds to the circumference of 57mm, and the ring number is 17.
The ring is different on the left hand and the right hand.
Left hand ring:
Left ring finger: represents marriage
Left little finger: on behalf of unmarried people
Right middle finger: Already in love
Right ring finger: is in love period