Indiana is about 3.2 times bigger than Solomon Islands.

Solomon Islands is approximately 28,896 sq km, while Indiana is approximately 92,895 sq km, making Indiana 221% larger than Solomon Islands. Meanwhile, the population of Solomon Islands is ~702,694 people (5.8 million more people live in Indiana).
Tip: This to-scale comparison of Solomon Islands vs. Indiana uses the Mercator projection, which distorts the size of regions near the poles.