Antwerp is about 1.2 times smaller than Kuala Lumpur.

Kuala Lumpur is approximately 244 sq km, while Antwerp (map shows its 62 named neighbourhoods; the area covers the whole city) is approximately 208 sq km, making Antwerp 85.46% the size of Kuala Lumpur.
Tip: This to-scale comparison of Kuala Lumpur vs. Antwerp uses the Mercator projection, which distorts the size of regions near the poles.
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