Compared to last decade, body size of children has been changed because of many factors such as caloric intake, hereditary evolution, individual exercise, and so on. Naturally, children will grow up and they will become teenagers, college students as time goes by. Also, all children will enter into appropriate educational institutes according to age. The objective of this study is to compare and analyze the data of body size of children for safe educational environment. The data are measured by some parts on body such as stature, height, weight, circumferences, length, width, and depth. The samples for this study are randomly chosen from kindergartens in. Seoul and Kangnung during three months (2000. 3 ∼ 2000. 5).