"SPQR is an initialism from a Latin phrase, Senātus Populusque Rōmānus ("The Senate and People of Rome", see translation), referring to the government of the ancient Roman Republic, and used as an official emblem of the modern day comune (municipality) of Rome. It appears on coins, at the end of documents made public by inscription in stone or metal, in dedications of monuments and public works, and was emblazoned on the standards of the Roman legions."
Reference: Wikipedia
A Roman style ring decorated with the S.P.Q.R. inscription. Made of solid bronze. The ring is 6mm (0.2 inch) wide and can be adjusted between sizes 8 and 10 US scale (17 and 22 european scale).