Lao PDR shares a 505 km border with China to the north, 435 km of border with Cambodia to the south, 2,069 km of border with Vietnam to the east, 1,835 km of border with Thailand to the west, and a 236 km border with Myanmar to the northwest. The country stretches 1,700 km from north to South, with an east-west width of over-500 km at its widest, and only 140 km at the narrowest point.