Description: All models are placed on a rectangular or round base. Base sizes are given as two measurements in millimetres: front-width × side-length (e.g. most horse riders' bases are 25×50 SI). In some rare cases, models have round bases. In these cases, only a single measurement is given: the diameter of the base (e.g. a common War Machine base is a round 60mm base). For all rules purposes, only the base of a model is relevant and determines the model's location on the Battlefield, while the miniature itself is not taken into consideration.