There are four maps provided in Iron Front located in Poland and the Ukraine.
The largest being Staszow, which is 16km x 16km.
A map close-up of Staszow.
The Staszow historic city detail is extensive. Keep in mind that you can enter every building!
Next largest is Baranow, which is 8km x 8km.
Then Panovo, which is 5km x 5km.
The smallest map is Ivachev, at 1km x 1km.