1. Clothing: When buying some clothes, you may need to provide height and weight information to ensure the appropriate size. For example, customized clothes, shoes of special size or some sporting goods (such as ski equipment or special activity clothes) may need this information.
2. Fitness equipment and appliances: When buying some fitness equipment, equipment or fitness plan, the height and weight information may help to choose the right equipment or customize a personalized training plan.
3. Medical devices and products: When purchasing some medical devices, braces or therapeutic products, doctors or professional service providers may need to know physical characteristics such as height and weight to ensure the selection of appropriate products or therapeutic schemes.