Will 250cc and 275cc Breast Implants Give Me Mid C Cup?

Hello,
While I am not a huge fan of textured implants or "over the muscle" positioning, I can't tell much on your prospective post-operative size without examining you. The implant you have chosen may be a bit on the small side though.

It is better to communicate the desired size using both visual and measured data. A cup size is quite variable, as many responders have noted. I recommend patient bring a set of photographs to depict: too small. just right, and too big breast photos. I then incorporate that with chest anatomy data to decide what RANGE of implant sizes are possible.
In your case, it will depend on what "c cup" means to you visually. Based on a midsized frame, 275 should be ok. The surgeon can see intra-operatively if larger implant would be possible.
In a "over the muscle" plane, there is slightly higher risk of implant palpability, ripple, etc. It appears intuitive that on oversized implant may have more problems associated with it in the long term. I strongly believe photos will help you decide. Best
Reza Nabavian M.D.