The cost of returns is a significant and rising cost factor in the area of eCommerce. This applies to clothing, but also specifically to shoes. Approximately 50% of ordered shoes are returned to the retailer. In 75% of all cases, this is due to the wrong shoe size. In conjunction with a renowned German research institute the Germany company developed algorithms that allow biometric foot measurement using commonly available mobile devices. The application automatically generates the exact size in real-time adaptation to the selected shoe model, which then becomes the subject of the order.