This is a gents genuine onyx 10kt yellow gold filled initial "I" ring. The ring is 5mm by 10mm and can be worn as a gents smaller finger or boys size finger. Our store purchased these rings sometime in the 1970's-1980's. Available in size 4.75, 5.5, 5.75, 6.75, 9.75, 10. Very Classy ring indeed!