Liechtenstein is about 1.4 times smaller than American Samoa.

American Samoa is approximately 224 sq km, while Liechtenstein is approximately 160 sq km, making Liechtenstein 71.43% the size of American Samoa. Meanwhile, the population of American Samoa is ~45,443 people (5,732 fewer people live in Liechtenstein).
Tip: This to-scale comparison of American Samoa vs. Liechtenstein uses the Mercator projection, which distorts the size of regions near the poles.