Vanuatu is about 10 times smaller than Mississippi.

Mississippi is approximately 121,489 sq km, while Vanuatu is approximately 12,189 sq km, making Vanuatu 10.03% the size of Mississippi. Meanwhile, the population of Mississippi is ~3.0 million people (2.7 million fewer people live in Vanuatu).
Tip: This to-scale comparison of Mississippi vs. Vanuatu uses the Mercator projection, which distorts the size of regions near the poles.