India is about 15 times bigger than Idaho.

Idaho is approximately 214,314 sq km, while India is approximately 3,287,263 sq km, making India 1,434% larger than Idaho. Meanwhile, the population of Idaho is ~1.6 million people (1.4 billion more people live in India).
Tip: This to-scale comparison of Idaho vs. India uses the Mercator projection, which distorts the size of regions near the poles.