“…In compiling a sizing system and choosing a fit model, a firm uses proportional relationships among body measurements, or key dimensions, to achieve the company fit. Key dimensions are good predictors of measurements of other body parts but must be convenient to measure, correspond to integral parts of the garment, have a high degree of correlation with other dimensions important in design and sizing, and not be highly correlated with one another (McConville, Tebbetts, & Churchill, 1979). Researchers have found there is no single key dimension which can accurately predict both vertical (height, length) and horizontal (girth, breadth, depth) measurements; at least two measurements are needed, one for a vertical index and one for a horizontal index (Horridge & Woodson, 1988).…”