[@NekoMizu]

Perhaps if the population is only about a hundred thousand then a city would be around ten thousand and above and towns would only have a thousand or so. I don't know; I'm not big on specifics. I would think that a city is a central hub for trading, questing and such for a single region. Think of it like a kingdom surrounded by small towns and most go there to trade off their things.

Maybe there's somewhere out there. But if you could learn the in-site dice, I think it would be better.