Petite dress by John Zack Petite, Introduce it to your friends, Bold print, Plunge neck, Button detail, Puff sleeves, Zip-side fastening, Regular fit, Just select your usual size. Turning catwalk styles and red carpet looks into a collection of affordable dream dresses, London label John Zack channels a fun, party girl aesthetic. Now perfectly designed in petite proportions, the John Zack Petite collection is party prepped with jumpsuits, bodycon dresses and lashings of lace.