Corpus Christi is about 12 times smaller than Istanbul.

Istanbul is approximately 5,343 sq km, while Corpus Christi (map shows its 7 named neighbourhoods; the area covers the whole city) is approximately 431 sq km, making Corpus Christi 8.07% the size of Istanbul.
Tip: This to-scale comparison of Istanbul vs. Corpus Christi uses the Mercator projection, which distorts the size of regions near the poles.
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