What does womans ring 925 ks mean?

925 means that the ring is made of sterling silver. The KS is the maker's mark. I've been doing some research about it and found that this mark is from Kirsten Severin a danish silver worker. She worked from 1988-1990 so the ring is considered vintage. Also, if your ring has clear stones I'd get them tested at a jeweler. Chances are that they are real diamonds. I hope this helps!