Texas is about 1.8 times smaller than South Africa.

South Africa is approximately 1,219,090 sq km, while Texas is approximately 678,052 sq km, making Texas 55.62% the size of South Africa. Meanwhile, the population of South Africa is ~57.5 million people (32.4 million fewer people live in Texas).
Tip: This to-scale comparison of South Africa vs. Texas 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.