American Samoa is about 1.8 times smaller than Heard Island and McDonald Islands.

Heard Island and McDonald Islands is approximately 412 sq km, while American Samoa is approximately 224 sq km, making American Samoa 54.37% the size of Heard Island and McDonald Islands.
Tip: This to-scale comparison of Heard Island and McDonald Islands vs. American Samoa uses the Mercator projection, which distorts the size of regions near the poles.

Compare further: American Samoa vs. Heard Island and McDonald Islands

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