Country size comparison
compared to
Swaziland is about 19 times smaller than Vietnam.
Vietnam is approximately 331,210 sq km, while Swaziland is approximately 17,364 sq km, making Swaziland 5.24% the size of Vietnam. Meanwhile, the population of Vietnam is ~103.8 million people (102.7 million fewer people live in Swaziland).
Compare further: Swaziland vs. Vietnam