Can you help me understand these 2 VERY different implant size suggestions from 2 board-certified plastic surgeons?

Thanks for your inquiry, but without pictures and a full set of measurements it is hard to advise. You were given two very different opinions, I agree. Please revisit with them and get a better explanation, good luck.

Thank you for your question.
With breast implants, oftentimes your plastic surgeon will let you "try on" the different implant volumes prior to your procedure. You will be able to place the different implant sizes in a bra, and then place a tight fitting shirt over it to mimic the appearance post-operatively. I recommend speaking with a board certified plastic surgeon to discuss your options.

Thanks for your question! It isn't uncommon to get different opinions from different surgeons. Also, board certification does not necessarily indicate specialty. Make sure that your surgeon specializes in breast augmentation and has a lot of experience AND B&A photos for you to review. At the end of the day, you should trust your gut. Good luck!