+1 especially this part
General parameters for a plus model are height between 5'8" and 5'11", sizes 10 - 18. (Generally the New York market prefers smaller plus models in the 8-12 range, and the Los Angeles market favors 14/16's.) She must be a fit, toned, proportional hourglass, and have great skin and teeth, just like straight size fashion models. A beautiful smile is a must.
To reiterate: height, measurements, proportionality and your overall look are just as important to plus modeling as to typical fashion modeling. If you are 5'5" and 200 pounds you may be a plus size woman, but you are NOT a plus model.