Delaware is about 1.9 times bigger than Rhode Island.

Rhode Island is approximately 2,706 sq km, while Delaware is approximately 5,060 sq km, making Delaware 87% larger than Rhode Island. Meanwhile, the population of Rhode Island is ~1.1 million people (154,633 fewer people live in Delaware).
Tip: This to-scale comparison of Rhode Island vs. Delaware uses the Mercator projection, which distorts the size of regions near the poles.