The ring is approximately a size 7. The bi-level face of the ring measures between just over approximately 9/16 of an inch, or about 14.5 millimeters, high, to about 1/2 of an inch, or about 12.7 millimeters, high. The band narrows in back to just over approximately 3/16 of an inch, or about 4.85 millimeters wide. (Included you'll see a US Quarter in the photographs, for the measurement-challenged and ruler-averse.) It is marked inside, "925", and signed "NF", as well as being stamped, "Thailand". Weight is approximately 4.24 grams.
This is a vintage piece, which has been worn and enjoyed. There will be all of the the expected surface scratches and tiny dings in the silver from normal wear. The ring remains round and true. Hand polished, but there may be tarnish missed.