Pitcairn Islands is about 6,585 times smaller than Oman.

Oman is approximately 309,500 sq km, while Pitcairn Islands is approximately 47 sq km, making Pitcairn Islands 0.02% the size of Oman. Meanwhile, the population of Oman is ~5.5 million people (5.5 million fewer people live in Pitcairn Islands).
Tip: This to-scale comparison of Oman vs. Pitcairn Islands uses the Mercator projection, which distorts the size of regions near the poles.
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