The ring is approximately a size 5.5. The central face of the ring measures just under approximately 5/16 of an inch, or about 7.5 millimeters, high, and projects about 1/4 of an inch from the finger. The narrowest part of the band, just behind the tail, measures just over approximately 1/16 of an inch, or around 2 millimeters, wide. (Included you will find a US Quarter in the photographs, for the measurement-challenged and ruler-averse.) It is stamped inside, "925", and signed perhaps, "Boma". Weight is approximately 3.3 grams.
This is a vintage piece, which has been worn and enjoyed. There will be the expected surface scratches and tiny dings in the silver from normal wear. The ring remains round and true. Hand polished, but there will still be areas of missed tarnish, especially in the crevices and interior.
A super cute signed vintage Boma Sterling silver dolphin ring. Fantastic detail in the dolphin, even the face is well-rendered and lovely.