This is Josephine, the Average American Female and Joe Jr. a Typical 6 Year Old

Alvin Tilley, an industrial designer who specialized in anthropometrics, worked for nearly 50 years for Henry Dreyfuss Associates in New York, one of the leading American industrial design studios. Tilley's studies of human proportions were published in several books and became fundamental references in industrial design. The earliest, Designing for People (1955), featured three protagonists: Joe, Josephine, and Joe Jr.--created to epitomize the average American body types. Their carefully analyzed and measured figures are the result of an exhaustive study of the widely varied human population. The goal was to find an elusive average to serve as a model to guide industrial designers to create better designs that serve a wider public.