Micronesia, Federated States of is about 254 times smaller than Missouri.

Missouri is approximately 178,414 sq km, while Micronesia, Federated States of is approximately 702 sq km, making Micronesia, Federated States of 0.39% the size of Missouri. Meanwhile, the population of Missouri is ~6.0 million people (5.9 million fewer people live in Micronesia, Federated States of).
Tip: This to-scale comparison of Missouri vs. Micronesia, Federated States of uses the Mercator projection, which distorts the size of regions near the poles.