Aruba is about 15 times smaller than Rhode Island.

Rhode Island is approximately 2,706 sq km, while Aruba is approximately 180 sq km, making Aruba 6.65% the size of Rhode Island. Meanwhile, the population of Rhode Island is ~1.1 million people (930,247 fewer people live in Aruba).
Tip: This to-scale comparison of Rhode Island vs. Aruba uses the Mercator projection, which distorts the size of regions near the poles.