Bangladesh is 3.8 times larger than Bhutan.
Area: 143,998 km2 World Factbook
Population: 166,280,712 (July 2014) World Factbook
Bangladesh; officially the People's Republic of Bangladesh, is a country in South Asia. It is bordered by India to its west, north and east; Burma to its southeast and separated from Nepal and Bhutan by the Chicken’s Neck corridor. To its south, it faces the Bay of Bengal. Wikipedia
Area: 38,394 km2 World Factbook
Population: 733,643 (July 2014) World Factbook
Bhutan, officially the Kingdom of Bhutan, is a landlocked country in South Asia located at the eastern end of the Himalayas. It is bordered to the north by China and to the south, east and west by India. Wikipedia