Swaziland is around the same size as Hawaii.

Hawaii is approximately 16,635 sq km, while Swaziland is approximately 17,364 sq km, making Swaziland 4% larger than Hawaii. Meanwhile, the population of Hawaii is ~1.4 million people (238,540 fewer people live in Swaziland).
Tip: This to-scale comparison of Hawaii vs. Swaziland uses the Mercator projection, which distorts the size of regions near the poles.