The article describes the method of designing dummies, based on the requirements for typical mannequins for clothing and the principles of geometric modeling of objects of complex volumetric shapes. The information component of the methodology is the data obtained by three-dimensional scanning of individual figures without clothes and in clothes. An important part of the process of designing new dummies is the knowledge base about the thickness of the package of materials of the underwear layer at different anthropometric levels on the front, side and rear surfaces of the virtual three-dimensional model. These data will allow to design dummies with a high degree of physical similarity of the dummy to the real figure of the consumer, take into account the thickness of the underwear layer when conducting a virtual fitting and assessing the quality of the finished clothing, ensure the personalization of the design process for garments and increase customer satisfaction with the finished clothing.