Abstract: A properly sized article of clothing, such as footwear, can be identified by performing a 3D scan of a corresponding portion of a user's body and comparing the size, shape, and external volume of the corresponding portion of the user's body with known sizes, shapes, and internal volumes of articles of clothing offered by a retailer. This process can increase the ability of retailers to match consumers with properly fitting articles of clothing, such as footwear. Additionally, the proper size, and best fitting styles of footwear can be recommended to the user from a variety of offerings provided by the retailer. 3D scanning the user's body allows both retailers and customers to account for subtle size differences that exist in various clothing products and allow consumers to be matched with the best fitting clothing without the need to purchase or return multiple items.