Heard Island and McDonald Islands is about 30 times smaller than Falkland Islands (Islas Malvinas).

Falkland Islands (Islas Malvinas) is approximately 12,173 sq km, while Heard Island and McDonald Islands is approximately 412 sq km, making Heard Island and McDonald Islands 3.38% the size of Falkland Islands (Islas Malvinas).
Tip: This to-scale comparison of Falkland Islands (Islas Malvinas) 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. Falkland Islands (Islas Malvinas)

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