Plus-size dress by John Zack Plus, Take that dress code up a level, Plunge neck, Take a dive, Wrap-front design, Long sleeves, Front split, Bodycon fit, Skims in all the right places, Exclusive to ASOS. 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.