This heading of this ring is composed of 6 concentrical rings that stick into one another, without usage of any glue. The height of these rings alternate between 4 and 6mm, thus creating a 3D zigzag effect..
The heading is laser cut from 4 and 6mm birch plywood board. The ring itself is 6mm thick.
The size of the ring itself is selectable, available in 18 sizes from 15.3mm through 22.3mm inner diameter (US 4½ - US 13). The ring simply sticks into the middle of the heading. Sides of the ring is untreated, the outer curved surface is painted to black.
The ring is available at the following marketplaces.