Would you believe the creators themselves said that Chie had the biggest bust size among the girls? Yeah, I have trouble believing it too, but that's what they said.
Fragbet85 said: No, it's implied that Naoto is bigger than expected and she just hides it well. At no point does it imply she "beats everyone". And in case you're interested, Naoto is supposed to be the second biggest, followed by Rise. Yukiko has the smallest.
Eh, since when? Canon never goes into much detail about this so there's no real right or wrong answer. But I know the fandom more or less seems to accept bust size from largest to smallest: Naoto, Rise, Yukiko, Chie. (Though sometimes I've seen Yukiko and Rise switched.)
Fragbet85 said: Would you believe the creators themselves said that Chie had the biggest bust size among the girls? Yeah, I have trouble believing it too, but that's what they said.
Iunno, going the best I can (Bikini thing would be easiest to tell with, but Naoto doesn't have one of those.) going by the towel thing, It looks pretty even with Rise actually looking the smallest. It honestly to me looks like Yukiko/Naoto, Chie then Rise. Chie's probably my favorite but she certainly doesn't look the biggest, going by towel or bikini.