How long does it take for the boobs to drop? 3 days post op. (photo)

  Congratulations on having undergone the breast augmentation procedure. Your plastic surgeon, knowing the details  of your situation, will be your best resource when it comes to good assessment, advice, and/or meaningful prediction/reassurance.
Generally speaking, breast implants will "drop" into the pocket that was created during surgery. The rate of breast implant "settling" may depend on factors such as size of breast implant pocket dissected, tightness of the overlying skin/muscle layers, and size of breast implant utilized. Normally, it takes about 3-6 months (for some patients longer) to see the final result. It is very common for one side to settle faster than the other.
Similarly, it takes a few months for the breasts to "soften" in most cases.  Most of my patients tell me that their breast implants feel "part of them" somewhere between 3 to 6 months after surgery was performed. I suggest that you wait to evaluate the final result/size of the surgery (and go bra sizing/shopping)  when you are about 6 months to a year out.  
 There is definitely a physiologic and "psychological" (body image)  adaptation process that occurs, at differing rates for every patient, for patients who undergo any type of aesthetic surgery, including breast  augmentation surgery.  Understandably, patients often experience significant emotional "ups and downs" around the time of surgery.
 
Best wishes for an outcome that you will be very pleased with.

At 3 days post op, it is still very early in your healing process. It is perfectly normal that your implants have not dropped yet. It can take several weeks to several months for the breasts to fully settle and they may not settle at the exact same rate.  If recommended by your doctor, there are a few ways to encourage the breasts to drop such as massage and the use of a surgical bandeau. If you are concerned at all about your healing process, I recommend reaching out to your surgeon as he or she will best be able to guide you in regards to your recovery. Best of luck.

Hi & thank you for your question.You are very early in the healing process. It can take between 3 & 6 months for the breasts to drop and settle into position.  Continue to follow your surgeons instructions and contact him or her with any questions or concerns. Best wishes.