Estonia (Estonian: Eesti), officially the Republic of Estonia (Estonian: Eesti Vabariik), is a state 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 (343 km), and to the east by Lake Peipus and the Russian Federation (338.6 km). Across the Baltic Sea lies Sweden in the west and Finland in the north. The territory of Estonia covers 45,227 km2 (17,462 sq mi), and is influenced by a temperate seasonal climate. The Estonians are a Finnic people, and the official language, Estonian, is closely related to Finnish.