Wooden rings made from laminated wood: indian rosewood, spruce, padouk, wenge, ash, cocobolo, ebony, etc. The inner diameter of the rings is 18 mm (~UK P1/2) or 20 mm (~UK 1/2). They were impregnated with epoxy resin as a finishing coat.
The ring are handmade – sanded down from a piece of wood (scrap wood from guitar making) – so minor irregularities in shape are possible. These irregularities along with playing with different shapes and wood combinations make the ring unique.
You can find them in my Etsy online shop.