Chippers are machines that are used to chip or shred trees. The size of a chipper is typically determined by the diameter of the tree trunk that it can handle. For example, a small chipper might have a maximum diameter of 6 inches, while a large chipper could handle trunks up to 24 inches in diameter. There is no one-size-fits-all answer to the question of how big of a tree a chipper can take, as it depends on the specific machine. However, in general, larger chippers will be able to handle larger trees.