Rhode Island is about 79 times smaller than Idaho.

Idaho is approximately 214,314 sq km, while Rhode Island is approximately 2,706 sq km, making Rhode Island 1.26% the size of Idaho. Meanwhile, the population of Idaho is ~1.6 million people (515,015 fewer people live in Rhode Island).
Tip: This to-scale comparison of Idaho vs. Rhode Island uses the Mercator projection, which distorts the size of regions near the poles.