For cocktail rings, going up a half size is the standard recommendation. It is a practical adjustment for settings whose wider bases require more room at the finger than a narrow band would.
Visually Speaking
Black onyx has always played a different role in fine jewelry design. Its light-absorbing surface functions as a visual anchor that grounds a composition and increases the apparent luminosity of the surrounding metalwork and accent stones.
Product & Assortment
Rings, earrings, necklaces, bracelets, diamonds, gemstones, pearls, gold, sterling silver, estate pieces. Ross-Simons' fine jewelry range is a lot. On purpose. Because "all in one place, for every occasion" isn't a tagline. It's literally the inventory.