Copenhagen is around the same size as Fort Lauderdale.

Fort Lauderdale (excluding the city's 9.9 sq km of water area) is approximately 90 sq km, while Copenhagen is approximately 90 sq km, making Copenhagen 0% larger than Fort Lauderdale.
Tip: This to-scale comparison of Fort Lauderdale vs. Copenhagen uses the Mercator projection, which distorts the size of regions near the poles.