The present invention relates to system and method of pattern-making for mass customized production of apparels. More particularly, the invention relates to height and size customizations which enable customers to get garments fitted to their body measurements. Further, the invention relates to style customization that enables customers to fashion the garment to their style preferences. The system [100] of pattern-making for mass customized production of apparels comprises a computing module [101], an internet [102], user device [106], a design database [103] comprising a product pattern repository [103a] and an order pattern repository [103b], one or more servers [104], a processor [105], a customization input module [107], a user style recommendation module [108] and a comparison module [109]. Advantageously, the present invention achieves unit manufacturing of customized individual consumer orders obtained from an online store, a physical store or through other channels.