Mesa is about 3.3 times smaller than Los Angeles.

Los Angeles (including the city proper only) is approximately 1,215 sq km, while Mesa (map shows its 6 named neighbourhoods; the area covers the whole city) is approximately 367 sq km, making Mesa 30.24% the size of Los Angeles.
Tip: This to-scale comparison of Los Angeles vs. Mesa uses the Mercator projection, which distorts the size of regions near the poles.
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