Thank you for your question Your breasts do seem as they are sagging. This is could be due to the weight reduction you pointed out. Current research highlights the following as risk factors for sagging:Greater ageHistory of significant weight loss (>50 pounds)Higher BMILarge bra cup sizePregnancy Smoking If only weight reduction applies to you, then it is highly possible that your breasts had more fat than breast tissue which is why after weight-loss, they started sagging. Based on your photos, you seem to have grade 1-2 ptosis (sagging) and this means that your nipple is near the fold under your breasts (inframammary fold), and your breast tissue is hanging mildly below the breast fold. Although a breast augmentation will help you achieve the size goal, it will not be effective. In fact, you will not only have to go with a larger than usual implant, but it will also appear too low on your chest (bottoming out). The weight of the implant will worsen the amount of sagging. You may also have a double bubble deformity where the breast tissue overlying the implant droops below in front of the implant. It may also cause a snoopy deformity (named after the cartoon character snoopy) that happens when the implant is held sitting in a high position by tight pectoral muscles, while the natural breast tissue falls off the implant and hangs below at the bottom curvature of your breast. We have to think of the long-term results, not the short-term results. As such, you need a breast lift for best aesthetic results. If you are afraid of scars brought on by a breast lift, you can get an initial breast augmentation, and if you become unhappy with your results, then you can opt for a breast lift in the future. One last thing I need you to know is that you should not focus on the implant size right now as this has to be tailored to your breast boundaries and characteristics in what we surgeons call tissue-based planning. In this planning, we record your breast base width, the distance from the nipple to inframammary fold on stretch, and the amount of skin stretch in the breast skin near the nipple. These measurements among others allows us to choose an implant size that adequately fills your breasts providing a natural, and aesthetic look. Overly filling the breasts beyond their limitations can result in not only unnatural looking breasts, but also a multitude of problems such as, bottoming out (i.e., an empty upper pole, high positioned nipple), double bubble deformity, implant malposition, implant visibility, breast sagging, and breast tissue wasting, excessive thinning of breast skin, nipple hypersensitivity, or loss of nipple sensation, etc. I urge you to seek a board-certified plastic surgeon to have a consultation for an augmentation mastopexy. A breast lift can raise your breasts and breast augmentation can refill your breasts. An in-person consultation and exam will allow the surgeon to address your concerns, while meeting your expectations. Hope this helps.