How big is a "region" for setting up industry weightings?

[Woodruff]

Ok, so I'm working on creating my first map.  I'd like to set up regional industry weightings for some things (logging mills, for example, being in tree-covered areas).

But my problem is I don't know how big a "region" is in the context of setting this up.  The map editor doesn't really give me an indication (that I can find anyway) of how much or what land it covers.

Can anyone give me an idea of how big a region is in this context, or direct me to where I can see that in the map editor?

Thanks!

 

[Diablogrunt]

After region is created simply move the cursor over it and the area of region will highlight. If one region only then it covers the whole map. If you want the region in question to be a small area you will have to create a number of additional regions that do not do anything all around it.