This is clearly a design from the 1950-60s timeframe. Unique and still stylish - in fact maybe more so now that almost anything mid-century is sought after these days. This ring measures 1" x 3/4" on the top. The ring size is an approx. size 4-5, clearly meant as a pinky ring. It is marked on the inside with the word sterling and the maker's hallmark of BMB with the first B turned backwards. We have not yet finished researching the BMB hallmark to pin down the actual designer, but we expect our research will reveal that before too long. For now, we are pricing it based on other factors.