Please don’t assume that someone is married if you see a wedding ring on their ring finger. It is common for single ladies to wear a ring on their ring finger simply as a fashion statement.
Vice versa, don’t assume that someone is single if you don’t see a wedding ring on their ring finger.
Most times, people will buy a wedding ring for their ceremony, but not wear it daily.
Plus, I have noticed that the brand name of the ring is more significant in Korea rather than the size of the gem. People prefer big names like Van Cleef & Arpels, Cartier, Chaumet, Tiffany & Co and many more. This is quite the opposite in the US. 



