F is the average size. F is the abbreviation of the English word "Free", which means freedom and comfort. The clothes in size F are also the so-called average size, where F is the abbreviation of the English word "free", which means the size that most people can wear, but this size will be used on brand clothes, except accessories (socks, underwear, etc. ), and clothes are divided into sizes from XS to XXL. The characteristic of uniform size clothing is that there is only one size, which is designed according to the figure data of the public and is suitable for most people to wear. This kind of clothing has good elasticity and loose tailoring, and can adapt to the changes of different figures.