Which city is bigger than New York?

Is any city bigger than New York? I mean, seriously, I always pictured NYC as just…MASSIVE. Like, the biggest. But whoa, turns out I was way off! Mumbai being bigger? Okay, a little surprising. But then Beijing and Shanghai dwarfing it?! Mind. Blown. And even Mexico City is bigger in North America! It really makes you think, doesn't it? Like, what even is "big"? You know? I remember visiting NYC once and feeling so overwhelmed by the sheer number of people, but now I'm picturing places like Mumbai and…wow. Just wow. It really puts things in perspective, how densely packed some parts of the world are. Makes you realize how much you take for granted, I guess. Like, I bet navigating those cities is a whole different ballgame. Imagine trying to catch a cab in Mumbai during rush hour! Yikes!