The bra size consists of two parts: the bust and the cup.
Bust consists of two parts: upper bust and lower bust
Upper bust: the size of the soft ruler around the body horizontally along the nipple
Bottom bust: the size of the soft ruler around the body horizontally along the bottom of the chest

About the international size chart for bras；

Take the common [75B] as an example；

1. The number “75” represents the lower bust

2. The letter “B” represents the cup

Upper waist measurement method:

When measuring the upper circumference, the upper body is tilted 45°. The soft ruler goes around the milk point one week to get the upper bust size.

Q: Why do you want to measure the upper bust at an angle of 45°?
A: Due to the influence of gravity when standing upright, the breasts will droop slightly, so the measured size cannot include the actual size of the breasts, and bending at 45° can avoid this problem, so the measured data is closer to the real body Situation. Of course, there will be some errors in the measurement process. If you are not sure about the measured size, you can measure it three times and take the average of the three times.

Lower waist measurement method:

Stand upright with the soft ruler close to the bottom of the breast, and circle the chest horizontally to get the size of the lower bust. (You don’t need to breathe in, just be in a natural state; the soft ruler does not need to be tightened and tight.) TIPS: If the breasts are sagging, lift the breasts and measure the upper and lower bust; if the measured value is a critical value, choose loose or tight according to personal preference Style.

3 Calculating the size After measuring the upper and lower bust data, we need to calculate our underwear size based on this value.
Bust = the close value of the lower bust. The value of the lower bust we see when buying a bra is usually 70, 75, 80, 85, 90, 95, 100, 105. You will find that they are all multiples of 5. This is indeed the case. The value of the lower bust is finally selected as a close value, and the allowable error is plus or minus 2.5cm.

For example: if your lower bust is 77cm, then you should wear a size 75 bra. If it happens to be 77.5cm, then you can try both 75 and 80 to see which one is more suitable.

 

Cup size = upper bust-lower bust ；
Bras are generally divided into six types: AA, A, B, C, D, and E, indicating the depth of the cup. The size difference between each type is determined by the difference between the upper and lower bust.

AA~about 7.5cm  , A~10 cm  , B~12.5 cm , C~15 cm , D~17.5 cm , E~ 20 cm;

Q: A girl has a lower bust of 76 and an upper bust of 87. What is her cup?

A: 87-76=11

11 Between 10 and 12.5, it is recommended to choose B cup~

TIPS:
1. If there is too much fat: when the difference between the upper and lower circumferences is measured to a certain cup level, the cup level should be selected one level larger. (For example, when the difference is C level, D is usually selected)
2. The calculated difference is rather vague: try to choose a cup size one size larger so that there is room for breast development. (For example, the difference is 16 between C and D. Under normal circumstances, it is recommended to choose D) According to the measured bust and cup, we can know the size of underwear that really suits us~
In addition, you also need to understand that there are international sizes, and different underwear sizes may be different. You can compare them according to the table.

Women should measure their breast size every six months.
Especially for women during pregnancy and breastfeeding, because your body shape and breast shape are constantly changing, only by accurately mastering your bust can you find the most suitable underwear size~