Cache Strapless Iridescent Blue & Black Beaded Long Mermaid Dress Vintage Size 4 Beautiful Cache iridescent dress blue to black dress. Perfect for prom, a fancy occasion, or if you just like to have style. In excellent condition, no rips or stains. Size 4. Please see measurements below. Bust 32-33 inches Waist 25-27 Length from bust line to the bottom on the dress 52 inches.