Exact Bezel Cup IDs may vary +/-.5mm. Create The Great Serrate! 2mm Cup Depth with pointed teeth to cradle your cabochons! 

Sometimes your stones won’t fit perfectly into the cups. If they’re too big, use a snap-on sanding disc with your flex shaft or a file to take the edge of your stone down a little. Sand around the stone evenly until the stone drops in. Always remember to use calibrated stones with bezel cups for the best chance of a perfect fit.