Little Rock is about 1.5 times bigger than Buenos Aires.

Buenos Aires is approximately 203 sq km, while Little Rock (map shows its 28 named neighbourhoods; the area covers the whole city) is approximately 314 sq km, making Little Rock 54% larger than Buenos Aires.
Tip: This to-scale comparison of Buenos Aires vs. Little Rock uses the Mercator projection, which distorts the size of regions near the poles.
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