In this paper the author tries to indicate, through a review of his research, that the scope of the study of body build stereotypes has been broadened to address the larger issues involved in assessing some of the implications of body build stereotypes for the development of body concept and interpersonal relations. Among the topics discussed are: (1) how might the inculcation of body build stereotypes provide a source of behavior/personality development, (2) are there differences in this area between males and females, (3) methodological issues, and (4) body build stereotype development and body concept. This is followed by a discussion of some implications of body build stereotypes for interpersonal relations. The author asks what is the relation between the attitudes that people hold toward others having fat, thin, or average body types and the behavior shown toward these physique groups. Several questions are presented and the author presents the findings of one research direction. (BW)