Prada Sleeveless Embroidered Knee-Length Dress in White/BlueWhite and blue Prada sleeveless knee-length dress with embroidered detail throughout, scoop neck and concealed zip closure at back. Purchase Worn by Crown Princess Mary on:1 August 2011 Blue Prada, Dress Shopping, Crown Princess Mary, Princess Mary, Crown Princess, Knee Length Dress, Sheath Dress, White Blue, Dress Shop