G’day Gene; Don’t measure at all! Cut a strip of masking tape 1/8"
wide and carefully wrap this completely around the stone. Push the
stone out and cut the piece of tape in half or thereabouts, lay the
tape on a flat surface sticky side down, and that is the length of
your bezel strip, plus the thickness of the metal.
Cheers for now,
John Burgess; @John_Burgess2 of Mapua, Nelson NZ