Heard Island and McDonald Islands is about 1.2 times bigger than Grenada.

Grenada is approximately 344 sq km, while Heard Island and McDonald Islands is approximately 412 sq km, making Heard Island and McDonald Islands 20% larger than Grenada.
Tip: This to-scale comparison of Grenada 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. Grenada

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