Cup size = bust-lower bust (for example: 10cm=A cup, 13cm=B cup, 15cm=C cup, 18cm=D cup, 20cm=E cup).

For example, if a woman has a bust of 85cm and a lower bust of 70cm, then the bra size is 70cm, and the cup size is 85cm-70cm= 15cm.

Generally, cups are represented by capital English letters such as A, B and C, and every 2.5cm is a grade. The minimum size is 7.5cm, A is 10cm, B is 12.5cm, C is 15cm, D is 17.5cm, E is 20cm, and it is considered as a special size after going up.

Extended information: basic structure of women's underwear;

cup

Generally, it is bowl-shaped, with/kloc-0 on the left and right sides. Generally, the lower edge has a fixed arc-shaped steel wire ring, which can support the lower edge of the breast, and its role is to support the left and right breasts, which is the most important part. According to the coverage area, cups can be divided into full cups, three-quarters cups and half cups.

braces

Surround the part below the breast in the form of a circle around the chest, and tie two cups to help fix the cups. The invisible bra does not have this part.

shoulder/pectoral girdle

Extending from the upper end of the cup part, passing through the shoulder to the back, connected with the shoulder strap. When in use, the elastic length can be adjusted through the adjuster on the shoulder strap, so that the cup part is close to the chest. Strapless bras and invisible bras do not have this part.

Reference: Baidu Encyclopedia Bra