The standard height for a 4-week-old girl is 103cm, but there are individual variations. Height is the vertical distance from the top of the head to the soles of the feet. Height is mainly influenced by genetics and endocrinology, with short-term nutritional fluctuations and disease having less impact. 4-year-olds should stand to measure their height. The height growth of girls tends to stabilize after 2 years of age and before puberty, which is about 5~7cm per year. height at this stage can be predicted according to the formula. The formula is: height = age x 7 + 75cm, so the general standard height for a four-week-old girl is around 103cm. However, height growth is not uniform and there are individual differences. Therefore, the value calculated by the formula is only a rough estimate of growth and should not be used as a standard for evaluating a child’s growth and development. Long-term dynamic testing should be conducted, taking into account individual differences, to make a comprehensive evaluation. If the height of a 4-year-old girl is significantly shorter, it is recommended that she seek medical attention in a timely manner.