S is the abbreviation of English small, M is the abbreviation of English medium, and L is the abbreviation of English large.
The size of clothes consists of three parts, one is height, the other is girth and the third is figure.
Take the M size of women's clothing as the standard, and measure the top by the bust. For example, 160/84A, 160 stands for people with height 160cm, and 84 stands for standard clear bust 160, without any other clothes.
However, it does not mean that the bust of this dress is 84cm. If it is a suitable summer dress, the bust of the ready-made clothes may be increased by 4-6cm on the basis of 84cm. If it is winter clothes, we should consider other clothes to wear inside, and the chest circumference of ready-made clothes may increase by 10cm or even reach 20cm.
Note: The data of different fabrics and styles are different. If it is elastic knitted fabric, the bust of the next-to-the-skin summer dress may even be reduced on the basis of 84cm to ensure a complete fit.