Timber may be sold as stumpage (trees before they are cut) or as harvested products (sawlogs, veneer logs, or pulpwood). If trees are sold as harvested products, the sale is customarily based upon measured volume. Trees marketed as stumpage may be sold by boundary, a measured estimate of stand volume, or individual tree measurements. Regardless of the price offered, a purchaser always estimates timber volume in a stand before buying it. In contrast, the seller too often has no idea what volume of timber is being sold. This publication explains how you can make your own tree or log volume measurements.