Just by looking at pictures, because obviously you can’t measure me, would you suggest UHP or HP breast implants? (photos)

I recommend HP.The implant selection should be based on a combination of your desired size, soft tissue dynamics, breast base diameter and skin elasticity.  I recommend an in-office examination as well as a detailed discussion with a surgeon who you are comfortable with.   Finally, make sure your surgeon is a Double-Board Certified Plastic Surgeon certified by the American Board of Plastic Surgery (ABPS), a member of the American Society of Plastic Surgery (ASPS), a member of the American Society of Aesthetic Plastic Surgery (ASAPS), and a fellow of the American College of Surgeons (FACS).Best,Dr. DesaiBeverly Hills Institute for Aesthetic Plastic SurgeryHarvard Educated, Beverly Hills & Miami Beach TrainedDouble Board-Certified, Double Fellowship-Trained Beverly Hills Plastic Surgeon

For a more natural, yet still very round shape, the HP would be a better choice.  The UHP would give a more unnaturally round shape.  If you go to your PS's office, you may be able to try on samples of both styles in different volumes to see which you like best.  That would be a great way for you to see what you would look like afterward.  Best of luck!

The difference between higher and lower profiles for a given volume is projection and for a given width is volume (with the high profile implant being greater in both scenarios). The moderate plus is the most commonly used profile in my practice. It allows for the most reasonable volume in a given BWD. In my practice, low profile implants are the least commonly used (widest and flattest). I will typically reserve high profile devices for smaller framed individuals or those seeking a less subtle more dramatic change (the opposite of natural). 
In general, the difference between a high and Mod (+), in reality, is very small (on the order of millimeters).  In my practice, I generally classify profile based upon patient preference. A higher profile provides a more dramatic look (size for size) vs. a moderate (+) profile which is relatively more subtle and understated. That being said the vast majority of patients will select a moderate + profile device (especially those seeking a more natural and subtle result).
I often find it is easier to decide on a profile (rather than a volume), this combined with BWD will determine volume. Trying to match a particular volume to a profile may lead a BWD mismatch. In my practice, smaller framed individuals do prefer higher profile devices. I discourage pursuing significant volume as this is a hallmark of the "augmented" or "fake" look. Small girls typically have smaller breasts. Over-sizing leads to a frame mismatch which is not "natural." The difference between mod (+) profile and high profile is subtle and less dramatic than the difference between low profile and the alternatives. Ultimately, it is a choice between more or less subtlety.
With regards to your specific question, if you are truly seeking a "natural" look I would avoid ultra high profile devices. Anatomy defines cleavage, not implants. No implant choice will correct for widely spaced breasts (that being said, this does not appear to be an issue based on your photos).
As always, discuss your concerns with a board certified plastic surgeon (ABPS).

during a consultation your surgeon is going to take measurements and want to see goal photographs. everyone has a different concept of what is a natural look. The higher the profile, the more rounded your breasts will appear

Based on your photograph, you seem to be starting at a good place and should have a very nice outcome with breast augmentation surgery. If I were seeing you in consultation I would ask that you demonstrate (using goal photographs) what you mean by "more natural rounded looking ones".  In most cases, the "rounder" the outcome, the less natural looking the breasts.   It may be best to avoid potentially confusing terminology and communicate your goals using visual aids such as goal photographs or computer imaging.

 Generally speaking, I find that the ultra high-profile breast implants are most useful for patients who want a rounder,  less "natural" outcome.

My best advice: select your plastic surgeon carefully. Make sure that he/she has significant experience achieving the types of outcomes you will be pleased with. Then, communicate your goals carefully, as discussed above.  In our practice, this is best done with the help of goal photographs and computer imaging. Working together you will come up with a good plan to achieve your goals.  Best wishes.

Hello. Thank you for your inquiry. It is important to have an in-person assessment regarding your concerns as it is difficult to determine virtually.

Exact end results and cup sizes are usually quite difficult to calculate as everyone has a different starting point.

There are many different factors that go into choosing a breast implant size which will correspond with your body dimensions while concurrently achieving your aesthetic results. Some of these factors are: Implant size (CC's), Implant profile (Low, Moderate, High), Placement of the implant (Subglandular vs. Dual Plane) etc. We utilize smooth round cohesive silicone gel 'gummy bear' implants for the best results.

During a consultation your aesthetic goals are heard and taken into account with the measurements of your breasts and the integrity of your tissue, as well as level of ptosis (sag). From here we collectively can find your 'perfect fit'. You are able to try out sizers and different implants in our office such that you can get an idea of what size you would be post-operation. We also offer Crisalix 3D plastic surgery virtual simulator during our in-person and virtual consultations to preview potential results. After your consultation, you will receive your very own implant sizers to take home with you (at a small cost) whether or not you decide to go forward with your procedure.

I usually recommend that my patients stop smoking, take vitamin C daily, and avoid aspirin/ibuprofen and vitamin E 3 weeks prior to surgery. I specialize in the 24-hour Recovery method which minimizes trauma to the breast and decreases pain post-operatively.

We encourage you to look at our website and Instagram (drkaraplasticsurgery) for lots of before and after pictures!
Please note that this response does not substitute patient-doctor relationship. We welcome any and all patients seeking advice to come in for a complimentary consultation available for limited time only.

During the COVID-19, we are offering complimentary online consultations as well as in-office consultation with social distancing and masks. Procedure done in-hospital private surgical facility while taking covid-19 precautions. We utilize UV-light to clean the air of viruses and bacteria during our consultations and surgery.

We invite you to come in to discuss your options more thoroughly. Please send us an email at info@drkaraplasticsurgery.com with the subject line: "Attention Meagan" and we will be happy to coordinate your appointment!

M.Kara,MD,FRCSC (27+ years experience) - Specializing in 24 hour recovery/ out to dinner breast augmentation in-hospital private surgical facility for your added safety and peace of mind

If you really want a more natural looking result, stay away from the UHP as that will give a very artificial look. A full profile with the most cohesive gel, such as the Natrelle Inspira Cohesive model can get the extra roundness in the upper breast that you will like.