This ring was made by Sarah Coventry and is marked Sarah Cov on the inside of the band. The ring is adjustable. The cameo is a 7/8 inch (2 cm.) x 1/2 inch (1.5 cm.). It is brown molded plastic on a clear brown glass(?) oval. The cameo is a classic bust of a lady. The back of the ring is closed. Condition is perfect vintage.