Heard Island and McDonald Islands is about 428 times smaller than Uruguay.

Uruguay is approximately 176,215 sq km, while Heard Island and McDonald Islands is approximately 412 sq km, making Heard Island and McDonald Islands 0.23% the size of Uruguay.
Tip: This to-scale comparison of Uruguay vs. Heard Island and McDonald Islands uses the Mercator projection, which distorts the size of regions near the poles.

Compare further: Heard Island and McDonald Islands vs. Uruguay

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