Just a resource, since our wiki lists height of characters: Female and Male stature by age with percentile lines. Of course I decided to crossreference this with Japanese Wikipedia, which only has a graph of average height by age -- notably these averages are essentially the same for boys up to age 15 and girls up to age 12, beyond which Japanese nationals' height drops below Americans. The percentile graphs are more useful, because you can tell what is tall, short, or just unlikely for a particular age.
"Kitto daijoubu da yo." - Sakura Kinomoto