I'm getting a 505hp gummy bear implant. What size will I be? And do I need to go larger to achieve full breasts? (photos)

i am not  sure the Vectra representation equals your 505 HP implant-I would seriouslydo more research into what would give you the best result.  at the end of the day,the computer is not performing your surgery, but a surgeon is. 

This is perhaps the hardest decision for
a patient to make, as well as the surgeon. Cup size estimates can be
misleading, but I generally advise patients that they will experience an
increase of approximately one cup size per 200 cc. You can try on implants in
the office by placing them into a special bra.Approximately 50 cc (1-2 oz.) is added to the final volume to account
for flattening of the implant in the partial submuscular pocket. Once you
decide on a size you like, then add on about 25-50 cc, because in real life the
implant will be flattened slightly by your tissues.Multiple measurements need to be taken to fit
an implant to your exact anatomy. Have your surgeon's office show you the
charts of the implant dimensions for the various profiles of silicone and
saline from the manufacturer. Then you and your surgeon can piece
together the puzzle by matching your measurements, with your wishes, versus
your tissue cover and the available implants to arrive at a surgical plan.Keep in mind larger implants tend to have
more problems over the years.You can also approximate this at home by measuring out an equivalent
amount of rice placed into a cutoff foot of old panty-hose, and put this in
your bra.Wear this around the house for
a while, and see what you think.Implant
size must square with assessments of tissue cover, breast diameter, and chest
wall width. Multiple measurements of your chest wall are taken (seven in
total). Implant size selection has been
an issue of much discussion. Therefore, I use a wide variety of methods, but the implant size is
always established preoperatively.Also,
patients are advised to bring reference photos demonstrating their ideal size
and shape. A photo album of patient pictures is maintained to assist them.
These photos ultimately help in determining where the implants will be placed,
since they can be shifted inside (to provide more cleavage), to the outside, up
or superiorly, and down or inferiorly during surgery. In determining the final
size selection, I always place the highest priority on the preoperative
measurements and potential tissue cover. Then, the patient’s verbal requests
are factored into the analysis.Our
average size over the last 6,000 implants was 350. Be sure to see only a board certified
plastic surgeon (by ABPS - The American Board of Plastic Surgery) who is a
member of ASAPS (The American Society for Aesthetic Plastic Surgery) and or a member
of ASPS (The American Society of Plastic Surgeons). Also, ask if they have an
established, high volume breast augmentation practice, performing several
hundred breast augmentations each year. Ask to see their before and after
photos if you didn’t see any on their website. If they are experienced,
they should have several 100 breast implant patients for you to view. I
would also recommend that your doctor offer you the chance to talk to past
patients who would be happy to discuss their experience with you. You
need to feel comfortable, so make sure the environment is safe as in an
accredited surgery center. Also, ask a prospective surgeon if he or she has
ever published journal articles in professional peer-reviewed journals, which
they can provide you.All the best,
“Dr. Joe”

Given your concern, it is best to communicate it to your surgeon.  From your photos you may not require that size, but measurements at your exam would confirm.  One thing to note that the Vectra will not be accurate because you have some ptosis and breast tissue.  This technology is not as refined as the sales folks would like to think. In fact the company Allergan, recently discontinued selling the device.