As of May 2009, Forever 21 does have a Plus Size clothing line. You can view more information about this at http://latimesblogs.latimes.com/alltherage/2009/03/forever-21-to-l.html, or shop at a local Forever 21 store.
There are a number of plus size dresses online. Macy's sell plus size dresses normally for sale online and in stores, although their prices are still quite high.
A couple websites that sell plus size evening dresses are http://www.igigi.com/plus-size-dresses and http://www.therosedress.com/Plus_Size/index.asp. You may also find them at large department stores, such as JCPenny or Sears.
There are many companies that sell plus size prom dresses in New York. A few of these would be Monif C. Plus Sizes‎, RKBridal Boutique‎, and E Dress Me Co Inc‎.
For fashionable plus size dresses, you can always check trendy clothes store and sites such as H&M, Forever 21, Urban Outfitters, as well as Abercrombie and Fitch, or Hollister.
There are some store that specialize in plus size prom dresses. Most store have a variety of prom dresses including plus sizes. You will find a great selection of plus size prom dressesat Macys. You can also order a dress online at sydneyscloset.com.
Here are a couple online shops that sell them: http://www.therosedress.com/dresses/dresses-pg14.html and http://sydneyscloset.com/ .
Sydneys Closet is one. Ross does have pluss sizes and some dresses.
There are some stores such as Wal Mart, Target and Kmart that all sell plus sized dresses. There are also stores out there that dedicate to the plus size individual. Lane Bryant and Torrid are the two major plus size retailers out there.
There are a number of options for one looking to purchase plus size dresses. For example, websites such as Macy's, Forever21, New Look and DressBarn all sell them.
Forever 21 sells cute and affordable clothing in plus size. Department stores also sell plus size clothing. These stores include Dillards and JcPenny.
As long as it's in the summer or the spring you can find plus size dresses on the website. They offer a wide range of plus size dresses and petite sizes as well.
Plus size dresses are available online from most of the major retailers. There are a great selection of new and gently used plus size dresses on ebay that can save you a fortune when shopping.