Country size comparison
compared to
Serbia is about 4.5 times bigger than Swaziland.
Swaziland is approximately 17,364 sq km, while Serbia is approximately 77,474 sq km, making Serbia 346% larger than Swaziland. Meanwhile, the population of Swaziland is ~1.1 million people (5.6 million more people live in Serbia).
Compare further: Serbia vs. Swaziland