In 2003, a study that measured over 1,011 pairs of women's pants found that more expensive brands tended to be smaller than cheaper ones of the same nominal size. The increasing dimensions of garments of the same nominal size has caused some designers to introduce size 0, 00, or other subzero sizes. Many commentators have suggested that "vanity sizing," as its name suggests, is designed to satisfy buyers' wishes to appear thin and feel better about themselves.
For another video clip titled, "Size 4 model 'too fat' to work"
Retouching: Real versus Fake: