Each tile has a land class. This class is determined by the amount of tiles sold in the country in which the tile is located. There are four classes:
- The first 100,000 tiles that are sold in a specific country will be of Class 1.
- The next tiles sold, up to 300,000 tiles in total, will be of Class 2.
- After the first 300,000 tiles have been sold, tiles up to tile 500,000 will be of Class 3.
- Tiles sold after the first 500,000 tiles in a specific country will be of Class 4.
However, it appears that for smaller countries, like Gibraltar, these numbers are different and only the first 10,000 tiles will be Class 1 (to be confirmed).
Unfortunately, you will not know for sure what class a tile you buy will be in till after you have purchased the tile. There is a page with Country Statistics, but unfortunately the data on it is very unreliable.