Why was the size of the polis important?

Like a state, each polis was also involved in international affairs, both with other poleis and non-Greek states in the areas of trade, political alliances and wars. ... The biggest was Sparta, although with some 8,500 km² of territory, this was exceptionally large and most poleis were small in size.

A city-state, or polis, was the community structure of ancient Greece. Each city-state was organized with an urban center and the surrounding countryside. ... The majority of a polis's population lived in the city, as it was the center of trade, commerce, culture, and political activity.

if you are talking about current time the answer is no

if you are talking about when the colonies were developing the answer is yes

answer: the ocean

explanation: if you map out 30 n and 40 n latitude, you will get the ocean