Considering Implants after weight loss, what type/size would I need to achieve this?

Thank you for your questions.  It is hard to tell from just your pictures and your goal pictures what size of implant and style would best achieve your goals.  The best thing is for an in person consultation with a Board Certified PS to make the right choice.  One thing I would definitely recommend is that you chose silicone implants.

Looking at your photos, you have a significant amount of breast volume below the breast fold.Therefore, I think you need a breast lift with the augmentation to achieve your desired result. Good luck!