What size tissue expanders should be placed in after a double mastectomy if you want to get final DD implants?

Great question.Generally cup sizes are not accurate indicators of breast size.I recommend patients undergo sizing and
evaluate their expansions on the type of the look they are interested in,
rather than focusing on a particular cup size.Expanders are placed based on your chest
wall measurements and expansions occur afterwards.This is when you will have the opportunity to
get an idea on the “look” you are interested in, rather than focusing on a “cup
size”, which can be very inaccurate in an implant surgery.Best of Luck.

I don't think there is an exact answer for that. Personally, I do not go by cup size as a final result. I go by size and shape of your breasts to match your torso.

Hello! Thank you for your question. In general, breast size does not correlate with bra cup size. The cup size itself will vary from manufacturer to manufacturer as well as who is doing the actual measurements. Thus, cup size is never a reliable indicator for your breast size. I typically encourage my patients not to communicate her desires in cup size but more on the actual look and appearance.  The tissue expander size should be determined by your chest width and which size expander will fit you best to expand the pocket that will be created. Good communication between you and your surgeon of your expectations is warranted - choosing your surgeon wisely is the first step. Discussion of your wishes and having an honest and open dialog of your procedure is mandatory (e.g, incision, implant type/projection, etc). I have found that photographs brought by the patient is helpful to get a visualization of the appearance you wish for in terms of size, shape, fullness, etc. In addition, your surgeon's pre and postoperative photographs should demonstrate a realistic goal for you. Once this has been accomplished, allow your surgeon to utilize his/her best medical judgment during the procedure to finesse the best possible result for you after preoperative planning and creating the most aesthetically-pleasing breast for you.  Hope me that this helps! Best wishes for a wonderful result!