Singapore is about 3.8 times smaller than Rhode Island.

Rhode Island is approximately 2,706 sq km, while Singapore is approximately 719 sq km, making Singapore 26.58% the size of Rhode Island. Meanwhile, the population of Rhode Island is ~1.1 million people (4.9 million more people live in Singapore).
Tip: This to-scale comparison of Rhode Island vs. Singapore uses the Mercator projection, which distorts the size of regions near the poles.