What is how tall is a 11 year old supposed to be?

The height of an 11-year-old varies depending on several factors such as genetics, nutrition, and gender. In general, the average height for an 11-year-old boy is about 56 inches (142.2 cm) and for girls, it is about 57 inches (144.7 cm). However, it is important to note that there is a wide range of height within this age group, and some children may be significantly taller or shorter than these averages. It is recommended to consult with a pediatrician to assess a child's growth and development.