rue21 is the largest fast-fashion retailer in the nation with over 1,100 stores. At rue21, we make the latest trends affordable and available to anyone, anywhere. Shop fun, fresh new trends and must-have styles at rue21 St. Peters that don’t exist anywhere else! This includes girls and guys apparel, shoes, accessories, tech gadgets, beauty, and home decor. Stop by rue21 1008 Mid Rivers Mall Road and see what you've been missing!