Pearl uniformity, also called "matching", describes how well the individual pearls have been matched within a piece of pearl jewelry. To make a single strand of pearls, a sorter may have to look through thousands of pearls to find enough pearls that match in size (half a millimeter of variance is acceptable), shape, color, luster, and surface quality. Uniformity is usually noted in terms of Very Good, Good, Fair, and Poor. Keep in mind that although the matching may be noted as Very Good, this does not necessarily reflect on the individual quality of the pearls.