Much smaller than a country. From a high point in the city you can probably see from one end to the other, so a medium sized city with a good amount of space outside of the walls of hills, fields and forests. Perhaps a few kilometers but I'm from America and we use the retarded system so I really don't actually know in my head how big a kilometer is I just know its smaller than a mile... Thanks Obama...

Edit: If I had to compare its size to anything its probably the amount of space New York City would take up, although only a little less than half of it is covered by the city.