doesn't ~に越したことはない mean "nothing's better than ~", or "~ is ideal"? so yuri saying "大きいことに越したことはない" on page 3 should mean she does think bigger is better. i think that makes more sense in the context of the surrounding panels being about the other characters trying to show off how big their tits are. why would they bother doing that if yuri just said she doesn't think bigger tits are necessarily better? w/e it's not really that important since she's not really making a very forceful or committed statement anyway (そうだな… / ~思うけど…)