Xorns grow in size as they age. The youngest xorns are approximately 3 feet in size, and can be represented by applying the young simple template to the statistics presented here. The most commonly encountered xorns are about 5 feet tall (and wide), while the largest are 8 feet or more and weigh upward of 9,000 pounds. These elder xorns are giant advanced xorns, but some even greater xorns exist as well, with upward of 15 Hit Dice.