Los Angeles is about 18 times bigger than Winterthur.

Winterthur is approximately 68 sq km, while Los Angeles (including the city proper only) is approximately 1,215 sq km, making Los Angeles 1,684% larger than Winterthur.
Tip: This to-scale comparison of Winterthur vs. Los Angeles uses the Mercator projection, which distorts the size of regions near the poles.
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