Generally speaking, the phenomenon that we were looking to mitigate is known as “Vanity Sizing”. In basic terms, vanity sizing is the practice of retailers to give nominal (“in name”) sizes that do not match the actual dimensions of the article of clothing. For example, a size 36 US used to imply that the suit jacket had a 36 inch measurement through the chest. Now, however, a size 36 suit may have actually dimensions closer to 37 inches due to vanity sizing. To help educate purchasing decisions, most retailers provide a sizing guide on their websites or in their stores that list which sizes correspond to each measurement.