Aruba is about 1,719 times smaller than Oman.

Oman is approximately 309,500 sq km, while Aruba is approximately 180 sq km, making Aruba 0.06% the size of Oman. Meanwhile, the population of Oman is ~5.5 million people (5.4 million fewer people live in Aruba).
Tip: This to-scale comparison of Oman vs. Aruba uses the Mercator projection, which distorts the size of regions near the poles.
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.