A method for virtually selecting clothing, the method including: obtaining photo or video images of a subject to be provided with selected clothing, transferring the images to a computing device; computing body parameters, wherein the body parameters are dimensions of the subject's various body areas, by using software for processing the photo or video images of the subject for determining body parameters thereof and converting the images into a form suitable for transferring to at least one website based on at least one web server; comparing the computed body parameters of the subject with size parameters of clothing being sold through databases of various manufacturers, and selecting articles of clothing meeting the subject's requirements; and forming a three-dimensional model of a mannequin having the body parameters of the subject and wearing the selected articles of clothing, the method being characterized by: - using at least two of the transferred images of the subject, the images being a front view and a rear view of the subject wearing an elastic template of a particular size type having reference markings, said elastic template used in determining the body parameters of the subject, wherein the computer processing of the photo or video images includes: - determining the size type of the elastic template by the type of reference markings on the elastic template, - determining the actual size of all body parameters by comparing dimensions of extensible portions on the photo or video images with reference dimensions of the non-extensible graphical elements on the elastic template, wherein the template has an elastic base extensible within one individual size type and wherein non-extensible graphical elements are of a particular shape and size and are affixed to an outer surface of the elastic base, said non-extensible graphic elements having dimensional stability and non-extensibility in all directions and serving as a size template, wherein the shape, the number and the positioning of the non-extensible graphical elements form an individual pattern for elastic templates of each size type. obtaining photo or video images of a subject to be provided with selected clothing, transferring the images to a computing device; computing body parameters, wherein the body parameters are dimensions of the subject's various body areas, by using software for processing the photo or video images of the subject for determining body parameters thereof and converting the images into a form suitable for transferring to at least one website based on at least one web server; comparing the computed body parameters of the subject with size parameters of clothing being sold through databases of various manufacturers, and selecting articles of clothing meeting the subject's requirements; and forming a three-dimensional model of a mannequin having the body parameters of the subject and wearing the selected articles of clothing, the method being characterized by: - using at least two of the transferred images of the subject, the images being a front view and a rear view of the subject wearing an elastic template of a particular size type having reference markings, - using at least two of the transferred images of the subject, the images being a front view and a rear view of the subject wearing an elastic template of a particular size type having reference markings, said elastic template used in determining the body parameters of the subject, wherein the computer processing of the photo or video images includes: - determining the size type of the elastic template by the type of reference markings on the elastic template, - determining the actual size of all body parameters by comparing dimensions of extensible portions on the photo or video images with reference dimensions of the non-extensible graphical elements on the elastic template, - determining the size type of the elastic template by the type of reference markings on the elastic template, - determining the actual size of all body parameters by comparing dimensions of extensible portions on the photo or video images with reference dimensions of the non-extensible graphical elements on the elastic template, wherein the template has an elastic base extensible within one individual size type and wherein non-extensible graphical elements are of a particular shape and size and are affixed to an outer surface of the elastic base, said non-extensible graphic elements having dimensional stability and non-extensibility in all directions and serving as a size template, wherein the shape, the number and the positioning of the non-extensible graphical elements form an individual pattern for elastic templates of each size type.