Seattle is about 1.2 times smaller than Taipei.

Taipei is approximately 272 sq km, while Seattle is approximately 217 sq km, making Seattle 79.95% the size of Taipei.
Tip: This to-scale comparison of Taipei vs. Seattle 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.