I have set three rubies into a sterling silver ring. The larger ruby is a lab grown stone of very good clarity. It measures 12mm and is triangular in shape. This stone was a faceted stone but had a chip on one side so I recut it into a cabochon. The other rubies are lab grown also and measure 2mm and 3mm in size. The band measures 2mm thick. This ring can be resized. I offer 1 free resize as we can't meet to try on ring gauges for a proper fit. Your only expense is $6.50 for return shipping.