Idaho is about 79 times bigger than Rhode Island.

Rhode Island is approximately 2,706 sq km, while Idaho is approximately 214,314 sq km, making Idaho 7,820% larger than Rhode Island. Meanwhile, the population of Rhode Island is ~1.1 million people (515,015 more people live in Idaho).
Tip: This to-scale comparison of Rhode Island vs. Idaho uses the Mercator projection, which distorts the size of regions near the poles.