If the height of an 11-year-old girl is 135cm, between one standard deviation and two standard deviations, she is classified as slightly short.The standard for normal height for an 11-year-old girl is 146.6cm, and the child’s height is currently classified as slightly short. If the height is lower than 133.4cm, it is considered dwarfism. If you want to measure whether your child’s height is normal or not, you need to examine the 11-year-old girl’s left wrist orthopedic film, i.e. bone age, to clarify whether your child’s actual height and bone age are on the same level. If the height is in line with the bone age within one year up and down, it is considered to be roughly normal, and observation can be given that there is a possibility of late growth. If the child’s height for bone age and actual height are indeed both dwarfism, intervention is needed. 11-year-old girls have mostly entered puberty, and if they do not have timely height intervention, they will miss the best time to treat their height.