France (Metropolitan) is 4,515 times larger than San Francisco.
Area: 549,970 km2 World Factbook
Population: 64,036,000 (June 2014) INSEE
Metropolitan France is the part of France located in Europe. It includes mainland and the nearby islands in the Atlantic Ocean, the English Channel and the Mediterranean Sea, including Corsica. Wikipedia
Area: 122 km2 calculated
San Francisco, officially the City and County of San Francisco, is the cultural center and a leading financial hub of the San Francisco Bay Area and Northern California. Wikipedia