Hard to find prom dress sizes are no match for PromGirl. PromGirl has dresses in all sizes, from petite to plus sized prom dresses, including designer dresses for 2009 prom available in sizes 12 to 18. Fabulous prom dress designers like Scala, Mori Lee, and Tiffany. Shop for a dress in every size to find your ideal dress for prom, homecoming or any special occasion.