Micronesia, Federated States of is about 3.9 times bigger than Aruba.

Aruba is approximately 180 sq km, while Micronesia, Federated States of is approximately 702 sq km, making Micronesia, Federated States of 290% larger than Aruba. Meanwhile, the population of Aruba is ~122,320 people (21,311 fewer people live in Micronesia, Federated States of).
Tip: This to-scale comparison of Aruba vs. Micronesia, Federated States of uses the Mercator projection, which distorts the size of regions near the poles.