Comparing it to Google maps, and the scale they give, I'm guessing about 400km from northmost point to south most, and 600 km east to west. I didn't measure it very carefully mind, because I don't really care what the answer is. You could try using the same prinicpal, and see what answer you get.
For one thing, this has nothing to do with Gameplay, so you're in the wrong place. For the other, nation maps are entirely roleplay, so it's up to you to decide. Thread locked.