Plus-size model is a term internationally applied to a woman who is engaged primarily in modeling garments that are designed and marketed specifically for larger body sizes and types (see plus-size clothing).
These models are also increasingly engaging in work that is not strictly related to selling clothing, i.e. body acceptance imagery, lifestyle and advertising, beauty/cosmetic products, pharmaceuticals, shoes, etc. As such, plus-size models often do not wear garments designed and marketed as plus-size clothing. This is especially true of magazine editorials.
The requirements for plus-size models are no different from those of high-fashion models, excepting in larger overall bust-waist-hip measurements; they must have excellent skin, hair and teeth, and emote well to the camera. The type of work that plus-size models engage in is of comparable variety to that of their counterparts.
Advertising campaigns, magazine editorials, catwalk work, live-TV work and commercials, etc. comprise the variety of work available. Increasingly, plus-size models are also being employed by the media to stimulate debate on healthy self-esteem and body image, especially regarding struggles with eating disorders. Synonymous and interchangeable with plus-size model is ‘full-figured model’, ‘extended-sizes model’, ‘outsize model’ (predominant usage:UK).
Read more: http://en.wikipedia.org/wiki/Plus-size_model