How are batholiths distinguished from smaller stocks?

Batholiths and stocks are both large, irregularly shaped intrusive igneous rock bodies, but they are distinguished by their size. Plutons with a surface exposure larger than 100 square kilometers are classified as batholiths, while those smaller than this are called stocks.12

It's important to note that some stocks might be the exposed portions of larger batholiths that have not yet been fully uncovered by erosion. Batholiths are typically deep-seated intrusions, whereas stocks can form at shallower depths, potentially only a few kilometers below the surface.1