Adjacent to the island is the Strait of Kasos, through which some of the Modified Atlantic Water enters the Sea of Crete. Its shape is elliptic and resembles that of Rhodes. The main island has a surface of , and it is  long and  wide.
Adjacent to the island is the Strait of Kasos, through which some of the Atlantic Water enters the Sea of Crete. Its shape is oval and resembles that of Rhodes. The main island has an area of , and it is  long and  wide.