Regarding your request, this is a natural baroque pearl. Since these are natural pearls, they are undrilled. The size varies depending on where you measure, as they are baroque pearls. They range from 9mm to 11mm. Because they are untreated, there is a possibility of discoloration. Is this acceptable? The color of the pearls is more of a blue-gray than just gray. The natural color appears to be cream or brown, with a blue-gray overlay. I apologize if this is unclear. As there is a possibility of future discoloration, I've discounted the price a bit!