Aruba is about 1.4 times bigger than Nantucket.

Nantucket is approximately 124 km² (48 sq mi), while Aruba is approximately 180 sq km, making Aruba 45% larger than Nantucket.
Tip: This to-scale comparison of Nantucket vs. Aruba 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.