Shouldn’t Gulltown and White Harbor be bigger than Lannisport since they’re closer to the Free Cities? I’ve seen you note before that Lannisport is “on the wrong coast”.

Well, King’s Landing sort of breaks the pattern, but yes, it’s rather odd that two of the biggest cities in Westeros are on the other side of the continent from the main trade routes between Westeros and Essos, and that two of the smallest cities are on the east side of the continent closest to those routes. 

But there are decent reasons why White Harbor is small (it’s the youngest city in Westeros, the North is thinly populated), and one could argue that Gulltown’s size might be due to the limited size of the Vale (although I think that’s a bit meh).

The bigger issue to me is why there aren’t bigger cities in the Riverlands, Stormlands, and Dorne.