Hawaii is about 15 times smaller than Wyoming.

Wyoming is approximately 251,489 sq km, while Hawaii is approximately 16,635 sq km, making Hawaii 6.61% the size of Wyoming. Meanwhile, the population of Wyoming is ~563,626 people (796,675 more people live in Hawaii).
Tip: This to-scale comparison of Wyoming vs. Hawaii uses the Mercator projection, which distorts the size of regions near the poles.