Question: what is the average height of a 7th grade girl?
Answer: At 10 years old, the average girl is about 54 inches tall and weighs 72 pounds. By age 12, the average height rises to 59 inches with an average weight of 95 pounds. Fourteen-year-old girls are an average of 63 inches tall and 109 pounds. After age 14, girls' height begins to level off.