This set of cufflinks has the initials of RSC. They could be your initials or friends but there are other initials this pair could stand for such as Royal Shakespeare Company, Republican Study Committee, Royal Society of Chemistry, RSC Publishing Home, Rehabilitation Services Commission, Russell Sage College and so on and so on. The possibilities are endless. Overall size is 1 ½" x 3/8" and condition is perfect. There is no maker's mark.