The China national standard for footwear dimensions is a system used to indicate the length and width of a foot for which a shoe is designed. This sizing convention, often abbreviated as “CN,” directly reflects the foot length in millimeters. For example, a marking of “250” within a shoe signifies it is intended for a foot measuring 250 millimeters in length.
The significance of understanding this measurement system lies in its directness and precision, offering an alternative to less standardized international sizing systems. Utilizing the CN size provides a more accurate fit, reducing the risk of discomfort or injury caused by improperly sized footwear. Historically, inconsistencies in global shoe sizing led to the development and implementation of more precise, localized standards like this.