Northeast India (officially called North Eastern Region, NER) is the easternmost region of India representing both a geographic and political administrative division of the country. It comprises the eight states Arunachal Pradesh, Assam, Manipur, Meghalaya, Mizoram, Nagaland, Sikkim and Tripura. The Siliguri Corridor in West Bengal, with a width of 21 to 40 kilometres (13 to 25 mi), connects the North Eastern Region with East India. The region shares more than 4,500 kilometres (2,800 mi) of international border with Tibet in the north, Myanmar in the east, Bangladesh in the southwest and Bhutan to the northwest. It comprises an area of 262,230 square kilometres (101,250 sq mi), almost 8 percent of that of India, and is the largest salient (panhandle) in the world.