Lace Semi Formal Dress 100% Polyester For sizes XS-L please refer to the PacificPlex Junior Casual Sizing Chart. For sizes 1X-4X please refer to the PacificPlex Missy Formal Sizing Chart. Black Lace over Jewel-toned Satin Fit-and-Flare Silhouette Perfect Vintage Classic Style Top Pick For Semi-Formal Prom Dresses