Approx. 1 1/2 inches in diameter. Originally we thought thiswas from what's referred to as "Diana Line" jewelry but we can't find any documentation to that effect. Believed to be early 1960's. Probably 14k overlay.
We are currently unavailable until Tuesday, August 28. We will try to respond to emails during our absence. Purchase orders are welcome and will automatically reserve the item for you. We will be happy to confirm your purchases and answer any questions upon our return.