Cincinnati is 2.3 times larger than Fairfield, California.
Area: 98 km2 calculated
Fairfield is a city in, and the county seat of, Solano County, California, United States. Wikipedia
Area: 224 km2 calculated
Cincinnati is the third largest city in Ohio and the 28th largest city in the United States by metropolitan population and the county seat of Hamilton County. Settled in 1788, the city is located on the border between Ohio and Kentucky at the confluence of the Ohio River and the Licking River. Wikipedia