Generally, cups are represented by capital English letters such as A, B and C.. Every 2.5cm is a grade, with AA at least 7.5cm, A at 10cm, B at 12.5cm, C at 15cm, D at 17.5cm and E at 20cm.. Further up, it is considered to be a special size.
The number part represents the lower bust, and the letter part represents the cup, which is the fullness of the chest. For example, for a size 75B bra, 75 means that the lower bust is about 75CM+-2.5CM, while a B cup means that the difference between your upper bust and your lower bust is about 12.5cm+-2.5cm, and a cup.
Extended data:
Brass is one of the underwear used by women, also known as bra cloth, bra, bra or bra. Its function is to cover and support the breast. It is said that the word "bra" first appeared in 1907, when the American fashion magazine VOUGE printed the word "bra", and 19 1 year "bra" was officially included in the Oxford dictionary.
There are different opinions about the origin of the Bra, but most people think that it originated in France and is called "brasère" (BRA for short). Medieval European aristocrats wore very tight corsets. Later, because the corset was too troublesome, two handkerchiefs were used to make a corset, which became the prototype of a modern bra.
function
Women's breasts are mostly adipose tissue, and some ligaments and skin provide internal support. But sometimes these supports are not enough to support the breast (especially for elderly women) or prevent the breast from moving, thus causing pain and discomfort. The main reason for wearing a bra is to provide external support for the breasts and increase comfort and mobility.
References:
Baidu encyclopedia-bra