3D morphological data representative of reference size models of garment brands and respective categorizing data are introduced into an information processing system. These 3D morphological data are indexed by brand names, categorizing data, and volumetric, dimensional, and angular data derived from the morphological data in order to build a database of virtual human body profiles. For selecting a suitable profile matching a consumer's body, his/her personal measurements and categorizing data are introduced into the system, either directly if they are known, or acquired by scanning only a minimum numbers of points on the customer's body in a scanning booth so as to derive these measurements. Instead of methods of the prior art defining the body profiles of the consumers per se from the general population, this method attempts to categorize the body profiles of the specific brands' reference size human models, and all offered sizes, through the brands' grading rules.