Which brand of birth control pills increases breast size but doesn't cause weight gain?

None: Most birth control pills have 2 hormones - a type of estrogen and progestin. Most women don't have any side effects with the pill. Some people if they are hormone sensitive can get bloating, breast tenderness. You might notice slight swelling in breasts but not a noticeable increase in breast size. Most people who have bloating do see an increase in weight so typically they go together.