85A underwear means that the lower chest circumference is 85CM and the cup is a cup. The number in the underwear size indicates the lower bust size, common ones are 70, 75, 80, 85, etc., the letter indicates the cup, common ones are a, B, C, D, e, etc. What size is the underwear of 85A? The lower chest circumference is the length of one week horizontally around the bottom of the chest. When buying underwear, you must choose a number similar to your lower chest circumference. For example, if the lower chest circumference is 69cm, you should choose the underwear of size 70.
If you want to know what size of underwear you are suitable for, you need to measure the upper bust and lower bust and make a difference, because the calculation formula of the cup is: cup size = upper bust size - lower bust size.
If the difference between 'upper chest circumference - lower chest circumference' is about 10cm, a cup should be selected. （85aDeNeiYiShiShenMeCheMa）