In the first grade, that is, the seventh grade, the clothes worn in the seventh grade are probably 155. Children in grade seven usually wear clothes of size S or M. The standard height of children in grade seven is about 155cm and their weight is about 40kg, so they can choose size S when choosing clothes, and choose size M if the clothes are too small. What size clothes the seventh grade children wear also needs to be judged according to their specific height and weight ~