I make these rings from round solid copper wire. To finish I mattify it and oxidize it, then i brush some of the oxide off, giving it a raw, rustic look..
They are made with 3mm (8g) wire and the inside diameter is 40mm (approx. 1.5 inches) or 50mm (aprox. 2 inches). The small ones weigh 9.5 gram each and the large ones 11.5 gram each.
You can buy a single earweight or a pair.