China's DD Cup is purely between the D~E Cup, while Britain's DD Cup refers to China's E Cup. DD cups in American size refer to F cups in China. If a girl's lower bust is 70cm, and the bust difference is about 18cm, her cup can be called 70D (international standard) or 32D (British standard). The model pair is shown in the following figure:
Extended data:
Measure the upper bust size.
1. The length of a horizontal circle around the highest point of the chest (nipple) is your bust size. If you encounter decimals when measuring dimensions, it is recommended to adopt the progressive method, for example, 72. 1 cm, and calculate it as 73 cm.
2. After getting the size of the upper and lower bust, start to calculate the size of the cup.
3. Subtract the upper bust from the lower bust to get the difference between the upper and lower busts. The most suitable cup size can be obtained through the following girth difference cup comparison table.
Three points to pay attention to when measuring bra size
1, too much fat: choose a higher number of cups. (For example, when the difference is C, D is usually selected.)
2, the calculated difference is vague: you try to choose a larger cup model, so there is room for breast development. (For example, if the difference between C and D is 15, D is usually selected. )
References:
Baidu encyclopedia-bra size comparison table