Bangladesh is 2.2 times larger than Sri Lanka.
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: 65,610 km2 World Factbook
Population: 21,866,445 (July 2014) World Factbook
Sri Lanka, officially the Democratic Socialist Republic of Sri Lanka, is an island country in the northern Indian Ocean off the southern coast of the Indian subcontinent in South Asia. Wikipedia