In Korea, can a little daughter be bigger than a big daughter?

 ANSWER: Yes.

In Korean, 큰딸 means "eldest or elder daughter" but literally translates as "big (큰) daughter (딸)," and 작은딸 means "youngest or younger daughter" but literally translates as "small daughter," so the "big" (큰) and "small" (작은) in these words refer to "age," not "size." Therefore, it is possible for the younger of two daughters to be bigger in size than the elder.