Istanbul is about 12 times bigger than Corpus Christi.

Corpus Christi (map shows its 7 named neighbourhoods; the area covers the whole city) is approximately 431 sq km, while Istanbul is approximately 5,343 sq km, making Istanbul 1,140% larger than Corpus Christi.
Tip: This to-scale comparison of Corpus Christi vs. Istanbul 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.