Whole nutmeg is small, about the size of a plum pit, and is usually sold with 6 to 8 seeds per jar. Grate the seeds for just the amount you need, using a micro plane or spice grinder. Unlike ground nutmeg, this variety, lasts indefinitely as long as its stored properly.
What really distinguishes whole nutmeg from its ground counterpart is the potent flavour. Whole nutmeg is stronger tasting and has considerably more flavour.