Estonia is 3.5% larger than Rio de Janeiro (Brazil).
Area: 45,228 km2 World Factbook
Population: 1,257,921 (July 2014) World Factbook
Estonia, officially the Republic of Estonia, is a country in the Baltic region of Northern Europe. It is bordered to the north by the Gulf of Finland, to the west by the Baltic Sea, to the south by Latvia, and to the east by Lake Peipus and Russia. Wikipedia
Rio de Janeiro is one of the 27 states of Brazil. It has the third largest economy of Brazil, with the largest being that of the state of São Paulo, and the second being that of Minas Gerais. The state of Rio de Janeiro is located within the Brazilian geopolitical region classified as the Southeast. Wikipedia