What is the average height and weight of an eighth grade boy?

The average height of an eighth-grade boy in the United States is around 5 feet 3 inches to 5 feet 6 inches. The average weight can vary depending on factors such as body composition and genetics, but it typically falls within the range of 100 to 130 pounds. It's important to note that individual growth patterns can vary widely during adolescence, so these figures are just general guidelines.