Petite dress by John Zack, Worth making plans for, Asymmetric neck, Thigh-high split, Slim fit, Cut close to the body. 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.