Breast implants sizes can vary. A common mistake is to choose a breast implants size that is too big. Women love to have big breasts but when they are too big then it can look very unnatural. Many women are very unhappy when they find out that they have choosen too big breast implants. On the other hand, you will be very disappointed when you have chosen a size which was too small. Breast Implants Sizes
The world's largest breast implants are 1200cc breast implants. A cosmetic enlargement surgery for your breast with a size like this will definitley look unnatural but many want it just like that. And it's not only the women who like extra large breast implants.
For the surgery itself it does not matter much what size you choose. The volume of a breast implant is measured in cc where thirty cc equals 1oz. Typical sizes are between 275cc and 800cc. 800cc breast implants or even 1000cc breast implants will most likley result in a DD size and mean a big change in your look. The surgery itself takes just 2 hours.
Be also aware of the disadvantages of big breast implants, and probably also of the surgery itself. Any surgery bears risks. Large breasts can limit your freedom of movement. They may also be obtrusiv. They could also lead to back pain and headaches.
It's important to choose a good cosmetic surgeon for your breast augmentation. Ask for references and also for cosmetic surgery breast lift photos, before and after pictures. Every plastic surgeron should have them.
It's not important to have the biggest breast implants but the "best". The best are the ones which still look natural and perfectly merge with your body.