black ring

Common stone shapes include round, heart, and princess cuts. Some bridal-style listings also describe square halo-style settings.

Available sizes vary by listing, with many fashion and bridal options showing ranges from size 4 through 14. One smart ring listing specifically notes size 7 as an example.

The results include bridal and fashion black ring sets (engagement/wedding and promise styles) and a separate smart ring designed for health and activity tracking.

The smart ring’s listed battery life is up to 8 days.

The smart ring is listed at 3.8 grams and is described as an all-titanium design.