Prince Edward Island is about 1.6 times smaller than Yellowstone National Park.

Yellowstone National Park is approximately 8,983 km² (3,469 sq mi), while Prince Edward Island is approximately 5,620 km² (2,170 sq mi), making Prince Edward Island 62.56% the size of Yellowstone National Park.
Tip: This to-scale comparison of Yellowstone National Park vs. Prince Edward Island uses the Mercator projection, which distorts the size of regions near the poles.

Compare further: Prince Edward Island vs. Yellowstone National Park

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