While the map is 625 x 375 miles (which gives 234 375 sq.miles, so about the size of Ukraine or Central African Republic, or bit less than Texas - 268 580 sq.miles), most of it is sea, while the landmass is only a fraction. Instead of math I simply tried to squeeze all the lands on the map as much as possible and in the end I turned that the actual land area is about 44 000 sq.miles (or even less), so a size of Bulgaria, Cuba, Honduras, Guatemala, Benin or Liberia (and btw. - why You're using Liberian flag?
) or US state of Ohio.
Cuba, being an island, is probably most representative of these regarding the lenght of transport routes. It has 12000 km or railways (about 7500 miles), but around 2/3 used by sugar plantations, 60000 km (37500 miles) or roads, half of it paved.