The area of the Gulf of Riga is about 18,000 km². The maximum depth is 67 m. The island of Saaremaa (Estonia) partially separates it from the rest of the Baltic Sea. The main exit out of the gulf is the Irbe Strait. Ruhnu island, in the middle of the gulf, also belongs to Estonia.
The Gulf of Riga, as a sub-basin of the Baltic, also includes the Väinameri Sea in the West Estonian archipelago.
Estonia i// (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 Russia (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 humid continental climate. The Estonians are a Finnic people, and the official language, Estonian, is a Finno-Ugric language closely related to Finnish and distantly to Hungarian.