Swaziland is about 1.3 times smaller than Djibouti.

Djibouti is approximately 23,200 sq km, while Swaziland is approximately 17,364 sq km, making Swaziland 74.84% the size of Djibouti. Meanwhile, the population of Djibouti is ~1.2 million people (72,098 more people live in Swaziland).
Tip: This to-scale comparison of Djibouti vs. Swaziland uses the Mercator projection, which distorts the size of regions near the poles.
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