Afghanistan is 4.4 times larger than Nepal.
Area: 652,230 km2 World Factbook
Population: 31,822,848 (July 2014) World Factbook
Afghanistan, officially the Islamic Republic of Afghanistan, is a landlocked country located in Central Asia and South Asia. It has a population of around 31 million people making it the 42nd most populous country. Wikipedia
Area: 147,181 km2 World Factbook
Population: 30,986,975 (July 2014) World Factbook
Nepal, officially the Federal Democratic Republic of Nepal, is a landlocked sovereign nation located in South Asia. With an area of 147,181 square kilometres and a population of approximately 27 million, Nepal is the world's 93rd largest country by land mass and the 41st most populous country. Wikipedia