In NetHack, all monsters are classified in six distinct sizes: Tiny → Small → Medium → Large → Huge → Gigantic. Only monsters medium or smaller can wear cloaks, and only exactly medium monsters can wear shirts or armor. Size also restricts which monsters can move diagonally through a crack. Some types of weapon distinguish between "small" monsters (tiny to medium) and "large" ones (large to gigantic). Statues of tiny monsters cannot contain spellbooks; for details on the rest, see the miscellaneous items spoiler. Huge monsters cannot be engulfed, while medium-sized ones can.