national flag consisting of a dark bluish green field (background) incorporating a large, off-centre orange-red disk. The flag's width-to-length ratio is 3 to 5.the People's Republic of Bangladesh,[b] is a country in South Asia. It is the eighth-most populous country in the world and among the most densely populated with a population of 170 million in an area of 148,460 square kilometres (57,320 sq mi).