Last month Marc Jacobs CEO Robert Duffy was so impressed with the amount of Twitter feedback from customers who wanted plus sizes that he tweeted, "We gotta do larger sizes," to the company's more than 26,000 followers. It was great news to Marc Jacobs' fans who wear larger sizes. It also was evidence that, in this era of the social Web, fashion designers and retailers are no longer operating in an ivory tower or for solely the red carpet. While this strategy is hardly new for big corporations such as PepsiCo ( PEP - news - people ) and JetBlue ( JBLU - news - people ), many fashion companies are taking social media to new levels.
