The height and weight range values of a half-year-old baby, that is, a baby around 6 months old, vary slightly by gender. 6 months old boy: height range is generally between 61.4-75.8cm, with an average height of 68.4cm, weight range is between 5.97-11.72kg, with an average weight of 8.41kg. and 6 months old girl: height range is generally between 60.1-74cm, with an average height of 66.8cm, weight range is between 5.64-10.93kg, with an average weight of 7.77kg. For 6-month-olds, the average height range is 66.8cm and the average weight range is 5.64-10.93kg, with an average weight of 7.77kg. 6 months old children should consider adding complementary foods, and it is recommended to add iron-containing rice flour, and gradually add pureed fruits, vegetables and other nutritious substances to fully provide children with the nutrients they need to grow and promote their healthy growth.