Sydney's Closet was founded in 2003 by Phyllis Brasch Librach, an award-winning journalist. The brand specializes in designing and producing plus-size formal wear for women and girls in sizes 14 to 40. The inspiration for Librach to create this brand came from her personal experience of struggling to find a suitable prom dress for her teenage daughter.

Today, Sydney's Closet is recognized as a leader in designing plus-size formal dresses and offers its products through authorized retailers in the United States, Canada, Europe, Australia, and other parts of the world. The brand has gained significant attention for its stylish and diverse designs.