Designers and retailers have long thought of the plus size market as high-risk. Predicting what these customers will buy can be difficult, as they tend to be more cautious about styles.

Making larger clothes can be more expensive; higher costs for fabric cannot always be passed on to consumers. In turn, plus-size women shopped less because the industry was not serving them well.

Louise O'Reilly is one of Europe's best known plus-size models. She runs a fashion blog called Style Me Curvy, and she says women need to feel good about themselves before they will lose weight.

Weight loss expert Steve Miller, who lost several stone himself and now helps others to do the same, says pandering to the overweight is bad for their health.

Jacqueline Windsor, a partner at accountants PwC, says retailers may be waking up to the opportunity of styling for larger sizes. Vishala Sri Pathma presents.

(Picture: plus size fashion model in blue dress outdoors. Credit: Getty Images.)