The process of developing body size charts for a given population is a highly complex one as too many variables are involved. The requirements are often contradictory as in trying to provide the best fit using a minimum number of sizes. With the availability of advanced mathematical tools and anthropometric database it is now possible to address the issue as an optimization problem and to build a new sizing system. In the book, the theoretical efficiency of that approach has been demonstrated. It will contribute towards the categorization of sizes and measurements in general and make an opportunity for development of critical thinking skills and conceptualization as it would be impossible to study the clothing industry, without going into the area of sizing in so detail. The measurement and sizing mentioned is usually for general garments. It would be changed for leather garments since the thickness of leather; lining and interlining occupy extra spaces and become bulge.