The height standard for six-and-a-half-year-old boys is 111.7-129.9cm and the weight standard is 17.53-29.57kg. As long as a six-and-a-half-year-old boy develops normally and his height and weight are basically within the normal standard range, it means that the child is developing healthily. If it is higher or lower than the normal standard range, parents are advised to bring their children to the hospital for routine medical checkups in a timely and regular manner, so that abnormalities can be detected and treated in a timely manner. Generally speaking, the standard height of a six-and-a-half-year-old boy is 111.7-129.9cm, and the standard weight is 17.53-29.57kg. In addition, the daily diet should be as diversified as possible to ensure balanced nutrition, and it is recommended that children consume more fresh fruits and vegetables as well as foods rich in high-quality protein to promote growth and development and improve immunity.