Tajikistan is about 3.2 times smaller than Papua New Guinea.

Papua New Guinea is approximately 462,840 sq km, while Tajikistan is approximately 144,100 sq km, making Tajikistan 31.13% the size of Papua New Guinea. Meanwhile, the population of Papua New Guinea is ~10.8 million people (23,917 more people live in Tajikistan).
Tip: This to-scale comparison of Papua New Guinea vs. Tajikistan uses the Mercator projection, which distorts the size of regions near the poles.
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.