This can be done by measuring the size of the bust and the waist. Number in the size of a brassier denotes the length between the breasts and the waist. In addition cup size is denoted with a letter from A to D. Size A is the smallest and the D is the largest. Normally the difference between two according cup sizes is about 200ml.
Reasons to get the breast big or small
Most of the cases it depend on the genes. If mother's breasts are smaller then the daughter may. Inside of the women's body in every menstruation estrogen and progesterone contents are increasing and cause to increase the size of the breasts. If you need to increase the size of breasts you have to subject to a plastic surgery.
When subjecting to such surgery you have to measure the breasts. First wear a best suit brassier. Then measure the circumference of chest just beneath the breast (this is called the band size). In example let's think it is 24 inches. Add another 4 inches to it. Then it is 28 inches. If the circumference is an odd number then add 5 inches. Then you have to measure the bust circumference.
After getting these measurements you have to get the measurement around the bust across the nipples. In example if we think it is 32 inches, and band size is 28 you have to reduce the 28 from 32. Answer is 4. Then we decide the cup size is D. It is the 4th cup size. Measuring the growth of breasts is slightly different.
If your breast size is smaller than normal...
First wear a cup size of brassier which you like to grow your breast to. Then insert a water filled balloon or piece of cloths to fit the cup size. Then wear a body fit t-shirt and look if they are in size as you wish. If it is suit to you then measure the breasts. That is the size you have to grow your breasts up.
If you are consulting a plastic sergeant they have plastic gel pads to do this. After selecting the best suit size the surgery begins. In such surgery they insert breast implants using a cut. Those implants are made only for breasts which were used only by plastic sergeants. Those silicon implants are in different sizes and shapes.
What would you concern in this surgery?
Some women have a fear of tissue damages, cancer danger and breast feeding inability can occur in this surgery. But these silicon implants will not harm to you after implanting. Do not be afraid.