Tubing Sizes for Bezels

I have 4, 5, 6, 7, and 8mm stones I want to set using my own tubing
to make the bezels. Does anyone know offhand what size tubing I
should order to be able to fit those size stones. I will cut my own
steps, etc.

Thanks.
Catherine

Catherine, I have been buying heavy walled tubing from Hoover and
Strong for this purpose. The outside diameter that is one half mm
larger than the stone usually works after I burr out the step.
Although, I have been having a little trouble getting the stones
really tight, but I think that is just my step-cutting skills being
not so good.

Good luck,
Karin