Members of the Mercosur:
Mercado Común del Sur
The Mercosur is a trade agreement of currently 4 countries in South America.
All member states comprise a total area of 11.88 million km² and about 268.54 million people. This is 7.9% of the habitable area around the world and 3.5% of the world population. With an economic output of 1,923.32 billion US dollars annually, they represent around 2.3 percent of the global economy. The value of all exported goods of these 4 countries was 406.90 billion US dollars per year at last count.
Official website: https://www.mercosur.int/en/