Taipei is about 20 times smaller than Istanbul.

Istanbul is approximately 5,343 sq km, while Taipei is approximately 272 sq km, making Taipei 5.09% the size of Istanbul.
Tip: This to-scale comparison of Istanbul vs. Taipei 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.