Hi cahlincb, I usually tell my patients to wait at least 3 months before buying an expensive bra; however, if the hospital bra that is given to our patients right after surgery is too uncomfortable, I suggest that they buy a bra that gives good support, is NOT an underwire if the incision lies in the inframammary fold, and one that is not too expensive. The breast size can vary as the swelling goes down. The larger the new breast, the longer ti will take for the breast size to decrease.I personally do not like sports bras as they lose support for the breasts after a few weeks. The best thing to do is to check with your PS.Best,Dr. Christine Rodgers