Plus-size dress by John Zack Plus, Some days call for a little extra, Plunge neck, Take a dive, Front split, Slim fit, A narrow cut that sits close to the body. Turning catwalk styles and red-carpet looks into a collection of next-level dresses, London label John Zack preps you for the party. Fall for its plus-size range of lace, ruffle and cold-shoulder maxi styles.