Burma, officially the Union of Myanmar, is the largest country by geographical area in mainland Southeast Asia and is bordered by the People's Republic of China on the northeast, Laos on the east, Thailand on the southeast, Bangladesh on the west, India on the northwest, the Bay of Bengal to the southwest with the Gulf of Martaban and Andaman Sea defining its southern periphery.
Burma (Myanmar) is located between Chittagong Division of Bangladesh and Assam, Nagaland and Manipur of India to the northwest. It shares its longest borders with Tibet and Yunnan of China to the northeast for a total of 2,185 km (1,358 mi). It is bounded by Laos and Thailand to the southeast.
Burma has 1,930 km (1,199 mi) of contiguous coastline along the Bay of Bengal and Andaman Sea to the southwest and the south, which forms one-third of its total perimeter.