“The tallest adults are the ones who had the most childhood and adolescent growth before puberty started; puberty typically tacks on a standard nine inches, and then the game's over. "The children who are going to be the biggest adults are those who are tall by age one or two, and have a relatively late puberty," says Rosenfeld.” HeightTallGeneticsGrowth Spurt Book:The Tall Book: A Celebration of Life from on High Source: The Tall Book: A Celebration of Life from on High