The size of the wand is primarily important for two reasons:

- First, a larger wand contains more magical wood than a smaller wand, and the degree to which a wand's wood strengthens spells is proportional to the amount of wood. Thus all things being equal, a larger wand strengthens spells more than a shorter wand. This is the same reason why staffs strengthen spells more than wands, and why wands strengthen spells more than the smaller talismans do.

- Second, a very large wand ...