Pearls are undrilled unless otherwise requested below. Please note, once a pearl is drilled, the pearl is non-returnable. Half-drilled pearls will be drilled with the standard 0.9 mm hole. Depending on the size of the pearl, full-drilled pearls will be drilled with the standard 0.7 mm to 0.8 mm hole. If you need a larger hole drilled, please specify the millimeter measurement in the Special Instructions box during check out. Pearl care kit not included with this item.