Chad is about 16 times bigger than South Carolina.

South Carolina is approximately 77,983 sq km, while Chad is approximately 1,284,000 sq km, making Chad 1,547% larger than South Carolina. Meanwhile, the population of South Carolina is ~4.6 million people (13.3 million more people live in Chad).
Tip: This to-scale comparison of South Carolina vs. Chad uses the Mercator projection, which distorts the size of regions near the poles.