This tells you how many models of this type form a unit. Most often, this will be presented as a number followed by a '+' symbol, 5+ for example, indicating that a unit made up of this type of model must contain at least five models.

In some cases, this may be a number range, 5-30 for example, indicating that a unit made up of this type of model must contain at least five models, but no more than thirty. In other cases, most notably in the case of characters, chariots or monsters, this will be presented as a simple number, usually a '1', telling you exactly how many models make up the unit.