9.5 x 10mm - Generally for older women, 45 years and up or extremely successful women in their 30s. The Lamborghini of pearls. Absolutely majestic and fit for a queen. The rarest size of all and virtually impossible to get, Japanese cultured pearls simply don't grow any larger than this. A guaranteed grand slam for Mother's Day, Christmas or any event for the elegant elderly woman. Made most famous by Barbara Bush, who was often seen with her pearls of this size coiled around her neck. Usually purchased as a double strand (36 inches).