At size 36, each 200 grams removed corresponds to 1 cup size change. You would need 400 grams removed to be a C and 600 grams removed to be a B. However, at 5’4 and 168 lbs, your BMI is 28 ½. You may not be happy with your breasts disproportionately small. The technique I recommend for reduction is The Bellesoma Method. This will reduce and reshape your breast tissue creating upper pole fullness without implants, elevate them higher on the chest wall and more medial to increase your cleavage. The weight of the breast is transferred to the underlying pectoralis major muscle resulting in pain relief without excessive reduction. Vertical scars are avoided, nipple sensation (in 95%) and the ability to breast feed are maintained. Best Wishes,Gary Horndeski, M.D.