Chula Vista is about 4.9 times smaller than Toronto.

Toronto is approximately 630 sq km, while Chula Vista (map shows its 22 named neighbourhoods; the area covers the whole city) is approximately 129 sq km, making Chula Vista 20.4% the size of Toronto.
Tip: This to-scale comparison of Toronto vs. Chula Vista uses the Mercator projection, which distorts the size of regions near the poles.
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