Joseph Pisenti of RealLifeLore (previously) explains visually and verbally how some countries are much larger than have been portrayed on maps due to the perspective of those who make the maps. Pisenti uses graphic overlays to show, for example, the incredibly long span of Indonesia, Japan, and Chile and the size of Brazil, D.R.C., Somalia, and China against the respective sizes of North America and Europe.
They are indeed much larger than previously thought.
From a European/Western perspective the world is sometimes shown to us from our point of view which makes our countries or our continents seem much bigger than they actually are. The fact is the world is a huge place and the West is just a small part of it.