United Arab Emirates is about 3.7 times smaller than Oman.

Oman is approximately 309,500 sq km, while United Arab Emirates is approximately 83,600 sq km, making United Arab Emirates 27.01% the size of Oman. Meanwhile, the population of Oman is ~3.8 million people (6.2 million more people live in United Arab Emirates).
Tip: This to-scale comparison of Oman vs. United Arab Emirates uses the Mercator projection, which distorts the size of regions near the poles.
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