Hello and Great Question. I appreciate the time you are spending researching this procedure. My name is Dr. Matthew J. Nykiel. I am a Board Certified Plastic Surgeon, a Fellowship Trained Cosmetic Surgeon, and a Butt Augmentation Specialist. Narrow Hips and V-Shaped Bodies (Butts) are great candidates for the procedure! Why? Because, a V-shaped body (Fat collecting in the flanks and a narrow hip); responds great to a Brazilian Butt Lift (BBL) or Liposuction & Fat Transfer. The liposuction portion will remove the excess fat in your waist, flank, back, and tummy. This brings the waist in and accentuates the hour glass.Then the fat will be used to contour your butt and hips. Specifically, to widen your hips inline with your goals. The bigger and rounder/wider desired butt, the more fat that will be needed. HOW DO WE KNOW HOW MUCH FAT IS NEEDED?I think the "right" amount of fat to transfer depends on 3 factors: 1. How much fat is available to transfer. What do I mean fat available after liposuction? Well, when liposuction is performed it removes fluid, blood, other tissue and Fat. Injecting anything other than Fat will not give you a rounder or fuller butt long term. In fact, I believe lack of fat processing may be one of the main reason why individuals complain of significant volume loss to the butt after surgery. Typically, after processing of the liposuction fluid, about 50% is high quality injectable fat. So in-order to get enough fat; we have to have enough to lipo. Do you have enough to lipo? Typically, that requires either a virtual or in-person consultation to answer. 2. How “stretchable” is the skin? Your skin will only stretch so much to hold the fat. Think about it like a water balloon under a faucet. I can leave the water balloon under the running faucet all day, but it will only fill up to its maximum stretch. After that, it will either break or the water will simply spill over. In a BBL, if you go beyond this threshold, than you start to risk infection and/or fat necrosis (hard fat lumps after surgery). 3. Finally, how big and/or curvy do you want to go? The bigger and curvier you desire, the more fat needs to be transferred. At least 10-20% of the fat injected will simply be re-absorbed. Therefore, you need to be "over-filled" so that after the swelling and fat absorption you the "right" volume left. In my hands, my average volume I put it around ~800cc to 900cc/side. Smaller individuals will have slightly less and larger individuals will have slightly more. If someone expressed they wanted a significantly large but then I would place more fat (up until their skin would no longer stretch to hold it). WHAT IF YOU DON'T HAVE ENOUGH FAT? Other options to think about: A) combination of butt implant and fat grafting to achieve an extremely round and projected butt. I think this is a great option if: 1) You want an extremely and significantly round or projected ("pop") to the butt or 2) If you have some fat that could be utilized to round/shape the butt but not enough fat to give volume or "pop" to the butt or 3) You don't have enough fat to accomplish your goals. If you choose to go this route, I think an important thing to remember is cc of fat does not equal cc of silicone implant. I would think of a cc of silicone implant as equal to 2-4 cc of fat injected. The silicone implant gives significantly more "lift". The fat grafted can then be used to shape/round the butt and "soften" the implant. What if you absolutely do not want an implant? Well than option "B") utilize fat transfer to the butt and then non-surgical volume with fillers. I like to use a proprietary technique and combination of fillers that creates volume and causes the body to form new collagen! Thus, becoming a permanent filler like fat!HOW TO KNOW IF YOU HAVE ENOUGH FAT?In order to determine this, an in-person or virtual consult needs to be performed. In my experience, I need to see at least 8 photo views of your torso (Tummy view, Tummy at 45 degrees x2 view, Side View x2, Back/Butt view, Butt/Back at 45 Degrees x2).Best of Luck! Please reach out if you have any further questions or concerns. Matthew J. Nykiel, MD#TopREALSELFDoctor#CoreREALSELFDoctorButt Augmentation SpecialistLiposuction SpecialistBoard Certified Plastic Surgeon