How was the size of the city-state detrmined?

The size of a city-state was typically determined by its geographic boundaries, which could be defined by walls or natural features like rivers or mountains. The population and the amount of arable land within these boundaries also played a role in determining the size of a city-state. Additionally, factors such as trade routes, military strength, and political influence could contribute to the expansion or contraction of a city-state over time.