Long Island is about 1.9 times bigger than Maui.

Maui is approximately 1,883 km² (727 sq mi), while Long Island is approximately 3,566 km² (1,377 sq mi), making Long Island 89% larger than Maui.
Tip: This to-scale comparison of Maui vs. Long Island uses the Mercator projection, which distorts the size of regions near the poles.
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.