Mali is about 9 times bigger than Illinois.

Illinois is approximately 143,961 sq km, while Mali is approximately 1,240,192 sq km, making Mali 761% larger than Illinois. Meanwhile, the population of Illinois is ~12.8 million people (7.9 million more people live in Mali).
Tip: This to-scale comparison of Illinois vs. Mali uses the Mercator projection, which distorts the size of regions near the poles.