Are 275 Ml Breast Implants Too Small for C or D Cup?

This question has many variables in it.  My favorite word when it comes to breast augmentation surgery is proportion.  How tall are you?  What do your hips/shoulders look like? How much breast tissue do you have to start with?   My most important measurement is the base width of the breast. 

That being said, women can be three different bra sizes at the same lingerie shop.  We also try and have patients bring in photos of what they like, as different people will have different aesthetic perspectives.

Most important is to have a good talk and exam with your plastic surgeon.  It is OK to ask questions.  Together you can come up with a plan to meet the goal.

That sound right, but know that cup sizes vary from manufacturer to manufacturer. Also, you may want to bring in pictures of breasts that you find attractive to your plastic surgeon. This way, you'll both be on the same page as to your specific goals. I actually have my patients place implants in their bra and look in the mirror to grossly determine the size that they want. Good luck!

This is not possible to predict without more information. We would need to know your height, weight, bra size now, and also measurements that are done at the doctors office.
You chose this plastis surgeon for a reason and you have to trust him. If you have no trust in him then you should find another board certified plastic surgeon to do your surgery. It is very difficult to predict the size after surgery. So I always ask my patients to focus on a look. They usually relay this to me by doing the rice test which is described on my journal section of my website.
Hope that helps you out.