Plus-size dress by John Zack Plus, Shawl lapel, Double-breasted button placket, Smart thinking, Pinstripe design, Means business, Regular fit - true to size. 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.