Buenos Aires is about 1.5 times smaller than Little Rock.

Little Rock (map shows its 28 named neighbourhoods; the area covers the whole city) is approximately 314 sq km, while Buenos Aires is approximately 203 sq km, making Buenos Aires 64.74% the size of Little Rock.
Tip: This to-scale comparison of Little Rock vs. Buenos Aires uses the Mercator projection, which distorts the size of regions near the poles.
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.