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Norderney is one of the seven populated East Frisian Islands off the North Sea coast of Germany. The island is 14 by 2.5 kilometres (8.7 by 1.6 mi), having a total area of about 26.3 square kilometres (10.2 sq mi) and is therefore Germany's ninth-largest island. Norderney's population amounts to about 5,850 people.

Buise was one of the East Frisian Islands off the North Sea coast of Germany that was almost entirely engulfed by the sea in the second half of the 17th century. The only remaining part is the eastern end, known today as the island of Norderney. Buise itself was formed by the breakup of a bigger island.