I am having problems trying to decide how big to make an area I am mapping. I am looking to have 11 (human) kingdoms on a large peninsula. But I have no idea the area I should have each kingdom take. I am looking for them to all border or be at least close to at least one other kingdom with some unclaimed while lands. I know there are several factors such as terrain but I am just looking for some averages or some guidance on how to decide how big of an area.