What is considered a small town, a large town and a city in terms of number of people?
In terms of the TDC universe there would be a few ways of what these would be. In many cases Melekure, the Grand City would be considered just that. A city, in the sense that it is where the main population of Aviur Demons (And many other species) dwell, it’s found in the center of all the other towns and locations around and is the most traveled because it is seen as the haven for everyone to go to. Large towns would be found around the outer area of Melekure and they would be much like a large town in our world today, they wouldn’t be as big as the Grand City and wouldn’t be like the smaller towns which would be seen as small farm towns along the outside areas.