1. Height and weight standards for 8-month-old babies. When the baby is 8 months old, the baby\’s height and weight have increased significantly. According to the children\’s growth and development standards, the height of male and female babies is 68.4-74.2 cm and 66.1-72 cm respectively, and the weight is 7.3-9.2 kg and 6.5-8.5 kg respectively. But this is only a general range, and every baby\’s growth and development is different. 2. 8-month-old baby