Here is a scroll saw pattern that will use up even the smallest scraps of exotic lumber. The ring on the right is zebra wood. The one on the left is a glue up of maple and walnut. Be creative with the glue ups to give the ring character.Notice the profile of the rings. It is important to take the time to sand the rings to this curved profile. If you leave them flat they look bad.
Make sure you cut the interior cut first.
The free pattern includes the sizes 5 - 13 US . After you cut the ring at the scroll saw you can custom fit the ring by sanding the inside. Don't leave any nibs inside the ring. Make sure it is smooth. Then profile the outside of the ring.
Sand the rings to at least 600 grit. You want them to feel as good as they look. Spray with several coats of spray lacquer and use 000 steel wool in between coats to smooth the finish.