You can judge your own bust size by measuring your bust size. For example, the upper bust is 80cm, the lower bust is 70cm, and the difference between the two busts is about 10cm, then your bust size is a cup. If the difference between the upper bust and the lower bust is about 12.5cm, it is a B cup. If the difference between the upper bust and the lower bust is about 15cm, it is a C cup.

Chest circumference is also another name for a bra. It is a kind of underwear used by women. Also known as bra, bra or bra. Sometimes replaced by "underwear", its function is to cover and support the breast. Bras originated in France and are called "Brassière", but generally referred to as "Bra".