Kevin et all!
As a simple setter for the past 47+ years, it is customary to have
the metal bezels designed with an on going supply of the same size of
stones. To mismatch in future with another near similar size is not
allowed in mass-production. Once the model-maker or silver
craftsperson makes the finished design, he has to allow for
"shrinkage" of estimated 10%, MAXIMUM ! The shrinkage is due to the
compression of rubber in the initial hot mold-making "hand-squeeze"
vise. Once the hot mold is released and cooled down, and after
cleaning, grinding and polishing, you will have a definite 10%
(estimated) reduction is total size.
DO NOT estimate the stone size PRIOR to rubber mold making, or
packing. This has to be decided upon in the actual silver “master
design” and initial fabrication. Basically, make all of your master
designs 10% larger.!!! Hope you didn’t get bored with my reply, but
all of these very important details and must be decided and discussed
with the model maker…Gerry Lewy!