Idaho is about 15 times smaller than India.

India is approximately 3,287,263 sq km, while Idaho is approximately 214,314 sq km, making Idaho 6.52% the size of India. Meanwhile, the population of India is ~1.4 billion people (1.4 billion fewer people live in Idaho).
Tip: This to-scale comparison of India vs. Idaho uses the Mercator projection, which distorts the size of regions near the poles.