Monitor shopping usually starts with resolution and refresh rate, but size is the decision that affects daily comfort the most. A 32-inch screen looks impressive in a store, but on a desk 60cm from your face it can be genuinely too large, forcing you to turn your head to see the edges or sit further back than your desk allows.
The honest rule is that 27-inch is the safer default for a typical desk at 1440p, while 32-inch only makes sense if you either sit further back, use 4K resolution to keep pixel density sharp, or specifically want a more immersive, cinema-like feel for gaming and media. Neither size is objectively better — the wrong one for your setup will bother you every day.
Below is a direct comparison, buying guidance for each size, and answers to the questions people ask when they can't decide between the two.