Solid ring with a polished surface. It looks like the ring is flowing into its shape, getting thicker and thinner all around. In the third picture you can also see the larger version SILVER FLOW RING NO1, which is a great match. Handmade in Hamburg.
Material recycled 925 Sterling silver
Measurements The ring has a round profile. The widest part at the top is about 5mm, the narrowest part at the bottom is about 2mm.