If I'm a 38i in a bra size what's the smallest size I can go down to with a reduction and a lift? No implants.

Final bra size after breast reduction can't be guaranteed. Regardless, results are dramatic. When you go in for your consultation, your plastic surgeon can give you an idea of how much tissue to remove, and what your final bra cup size might be. 

Hello, Technically, your breasts can be completely removed, but I'm assuming you would like to keep some curves and look proportionate. My recommendation to you is to seek out consultations with Board certified plastic surgeons in your area to be seen in person and go over what would be the best fit for you. Hope this helps. Best Wishes, Dr. Lane Smith Las Vegas, NV 

Great question!  First off, your BMI or body mass index needs to be less than 30 for surgical safety.  Higher than this, your anesthetic and post-surgical complications significantly increase.  You are currently at 38 and thus will need to be around 150lbs, therefore you will need to loose 40 pounds.  For elective surgery like this, it is best to be at your optimal health.  The weight loss will help decrease the size of the breast then you should have a consultation to see how small you can go.Best of luck and hope this information helps!
- Dr. Roger Tsai  @DrRogerTsai
Board Certified Plastic Surgeon