A method for modifying the dimensions of a design pattern embedded on a garment is disclosed. Original dimensions of the apparel and new dimensions according to which the apparel is to be modified are determined. A coordinate pair indicating the center point of the design pattern is determined. Two delta factors, one corresponding to height and the other corresponding to the width are determined. The delta factors indicate the difference, in terms of height and width respectively, between the original dimensions of the garment, and the dimensions to which the garment is purported to be modified. Subsequently, one of the delta factors is selected depending upon the nature of modification, and provided as an input to an affine transformation operation, along with the coordinate pair. The dimensions of the design pattern are modified based on the affine transformation operation and the selected delta factor and coordinate pair.