a lot of the ppl complaining about how small she is fail to realize that she is draw chino for most of the manga, but in the the official art (at the end of chapters and in the extras) she's not that small. if anything she looks to be asking 4'10-5'0" while he's around 5'8-10" (they never state their actual heights so I'm just guessing here)
anyway over great and wholesome manga, wish we could have seen more them during the time skip