What apartment size is ideal for a single person?

1. Under 23 pyeong
2. Around 24 pyeong
3. Around 32 pyeong
4. In the 40s (pyeong)
Which one do you prefer?
I'm not single myself, but... I feel like number 3 is the right answer lol
My bedroom + a guest room (for when friends come over to drink and stay the night) + a hobby room (for computer/exercise gear) + a spacious living room with a huge TV
Even if living alone, I'd want a big house.
Number 4 sounds good too, but it might be a bit overkill.