Size comparison

compared to

Martha's Vineyard is about 2.2 times smaller than Flathead Lake.

Flathead Lake is approximately 510 km² (197 sq mi), while Martha's Vineyard is approximately 227 km² (87 sq mi), making Martha's Vineyard 44.43% the size of Flathead Lake.
Tip: This to-scale comparison of Flathead Lake vs. Martha's Vineyard uses the Mercator projection, which distorts the size of regions near the poles.
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