The Baltic Island term is composed of 8 different islands located in the Baltic Sea. Saaremaa (8 letters) is the largest island of Estonia, Aero (4 letters) is an island in the Åland archipelago, Rügen (5 letters) is Germany's largest island, Ösel (5 letters) is an Estonian island, Öland (5 letters) is Sweden's second largest island, Åland (5 letters) is an autonomous region of Finland, Oder (4 letters) is a river island in Poland, and Riga (4 letters) is the capital of Latvia. Saare (5 letters) is an Estonian island.