This is a very nice sterling silver napkin ring by Mapin and Webb. It has a simple 'pinstripe' design and it is monogrammed with the initial F. It is marked Mapin and Webb and also marked Sterling.
It is about 1 5/8 inches in diameter and it is 1 inch wide. It is in very nice condition. I gave it a light polish, but it could be cleaned to a bright shine if desired.