Open ring , in the shape of the letter U,
2 hexagon shaped holes on top,
set with a Small (1.5mm) or Big(3 mm)Cubic Zirconia/Garnet/Nuts/Bolts.
Sterling Silver.
Third pic left to right : Small Garnet, Small Zirconia, Big Zirconia, Nuts, Bolts.

Ring is adjustable to fit your finger, choose from 3 size ranges:
Small = 5.5-6.75 US Size
Medium = 7-8.75 US Size
Big = 9-10 US Size

Perfect also as a pinky ring.