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Will 400cc Make a B-cup into a C or D Cup?
There is (obviously) a relationship between the size of the implant and the final size of your breasts. The larger the implant, the larger your breasts will be. However, there is no direct conversion that dictates that a certain size implant will take you from one breast size to another. The reason is your breast shape is defined by more than the size of your implants (think chest wall shape, skin envelope, existing breast tissue, asymmetry, sag, implant shape and many others!) If you're not sure about the size you can try different sized implants under your clothes. In our practice in Dublin, California we have many techniques to help patients decide on an appropriate size range. The final implant size is always decided in the OR. We use special temporary implants that help us match the size and shape to your post-op goal. It works great for our patients.
Clinical Context
Cup sizing isn't standardized across bra brands or countries, so there's no universal formula linking implant volume to a letter size. Surgeons rely on measurements like chest width, tissue thickness, and skin elasticity to predict how a given implant will look on your specific frame. Two patients with identical implant sizes can end up in different cup sizes, which is why intraoperative sizers and photos matter more than aiming for a specific letter.
