Making my own rings to use in designing my silver bracelets and necklaces is something I enjoy doing. It is a tedious task but I like the control I have over the quality of the rings (both in the precision of the sizes and the smoothness of the rings) when I do it myself.
It is possible to buy rings pre-made but I have not found rings of the quality that I am looking for. The sizing is especially important - if the rings to even 1 mm too big or too small, the design doesn't work as well (or, sometimes, not at all). So I continue the making from plain round wire to perfect, finished silver rings!