Abstract: Since the product design is changing from product-oriented to customer-oriented, we extended the traditional concept of product feature and put forward the concept of customer feature. We developed a customer-feature-based sunglasses fitting system using the front and side photos of a customer's head to construct the 3D facial model, and proposing the sunglass 3D models from sunglass database to fit on the face model. The system can help customers to choose proper sunglasses rapidly, and also offers support to sunglass sales.