Boma Sterling Silver Black Onyx CZ Flat Top Band Ring Size 5.5. Lovely black Onyx inlaid into .925 sterling silver and paired with an oval, multi faceted, CZ. Flat top design. Top measures 6mm wide. The ring is just shy of a size 5 1/2. Perfect for a pinky ring as well. Pre-owned, but in good condition, with only light minor scratches to silver, consistent with normal wear.