375cc or 400cc high profile?

Very few women lament being too larger after breast augmentation. Almost all, however, wish they had gone a bit larger.  Opt for the larger set.

The idea that "Implants placed above the muscle have no means of support. They will eventually make their way down your chest wall and stretch your tissues where you will need a lift sooner than later", is not based in fact or sound science.  The placement of implants over or under the muscle depends on the type of implant and the anatomy and tissue quality of the patient.  Some patients with very wide insertion of the pectoralis muscles (wide cleavage) will have their condition worsened by implants under the muscle. As the implants enlarge the medial attachments of the muscle force the implants into the armpits.Patients with tight cleavage and elastic tissue can get equally good looking results at rest.  When you flex the pectoralis muscles, implants under the muscle will get the jumping breast deformity to varying degrees, as a trade-off for going under the muscle.  Capsular contracture is a game changer in revisions because the recurrence rate is high and can distort any gains that may have been achieved by re-operation.As a general rule I do not predetermine implant size.  I would perform a complete capsulectomy and evaluate what I have left to work with. I would then decide what shape and size is best suited by placing sizers at surgery.  In these cases less is better as a starting premiss.

This is how I would approach your situation:  Given your history of capsular contracture and implants that are subglandular, I would likely begin by placing the implants behind the muscle.  Next, we would determine your base diameter and stay within the confines of that measurement to help avoid additional surgeries in the future.  This may mean that you will need a high profile implant to get a meaningful augmentation given your small stature.Hope that helps, good luck!