A widely used method of judging body proportions is to consider the ratio of sitting height to height (SH/H) related to age. A drawback of this method is that only one derived variable is used. A pairwise consideration of the original measurements provides more information. In this study data from the cross-sectional Oosterwolde I growth study are used to present normal values for the ratio SH/H for age, as well as values for sitting height related to height and subischial leg length. A comparison is made with other studies.