San Francisco is 2.3 times larger than Tel Aviv.
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
Area: 52 km2 calculated
Tel Aviv is the second most populous city in Israel, and makes up the largest part of the city municipality of Tel Aviv-Yafo, which has a population of 414,600. Wikipedia