For American men 20 years old and up, the average age-adjusted height is 69.1 inches (175.4 cm), or just over 5 feet 9 inches tall.

Height by age.

Age (years) 50th percentile height for boys (inches and centimeters) 9 52.6 in. (133.5 cm) 10 54.5 in. (138.5 cm) 11 56. 4 in. (143.5 cm) 12 58.7 in. (149 cm)
what is overweight for a 10 year old? Obesity is defined as a BMI at or above the 95th percentile for children and teens of the same age and sex. For example, a 10-year-old boy of average height (56 inches) who weighs 102 pounds would have a BMI of 22.9 kg/m2.

Furthermore, how tall should a 11 year old be in feet?

Its 58 inches, which is 4 foot 10 inches. What is the average height for a boy age 12 years? Its 60.5 inches, which is 5 foot zero and a half.

What is the average height for a 12 year old female in feet?

A 12 year old girl should be between 4 1/2 and 5 1/3 feet tall.