Petite jumpsuit by John Zack Petite, Done in one, Crew neck, Long sleeves, Lace inserts, It's all in the details, Regular fit, A standard cut for a classic shape. 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.