There is no national or international data collected for 10 year old boys.
However, according to a US government survey in 2002, the average height of a 10-year-old boy had increased from 55.2 inches in 1963 to 55.7 inches (4 feet, 7.7 inches) in 2002. By 2011, this may have increased another one or two tenths of an inch.
The tallest 10-year old is 6'3", although, standing at 4'10", the tallest 6 year old is Sophie Hollins.
It is difficult to determine who the tallest 11-year-old boy in the US is as this information is not typically tracked or publicly available. Height can vary greatly among individuals at the same age due to genetics and other factors.
Easy, the tallest 9 Year old GIRL is me!! At astounding 5'0!!
I'm 13 and 5'10.25". I am the tallest 13 year old female I know.
The tallest 9 year old is a boy called mercenze der oton in America and he is 6,5
The tallest old building in Japan is Tokyo Tower it is built in year 1958.
i heard there was a 17 year old who was 6'11.
4.5 Feet
The tallest 8 year old girl is me. I am 3ft. 11in.
5'4"
4 foot 11 ahahahah in my school we have a 6 foot 9 !! in hawaii oahu !! im 6 foot 1
Well an 8 year old can grow to be 5ft"3 im just 8 too and im just 3ft"11 but at my school Derek is thet tallest 2nd grader he is 4ft"10