Andorra is 7.7 times larger than San Marino.
Area: 468 km2 World Factbook
Population: 85,458 (July 2014) World Factbook
Andorra, officially the Principality of Andorra, also called the Principality of the Valleys of Andorra, is a landlocked microstate in Southwestern Europe, located in the eastern Pyrenees mountains and bordered by Spain and France. Wikipedia
Area: 61 km2 World Factbook
Population: 32,742 (July 2014) World Factbook
San Marino, officially the Republic of San Marino and also known as the Most Serene Republic of San Marino, is an enclaved microstate surrounded by Italy, situated on the Italian Peninsula on the north-eastern side of the Apennine Mountains. Wikipedia