What can give me bigger breast ? no i don't want implants ....

Breast enlargement: Of course garments/bras can be used. There are several other techniques to enlarge the breast with breast implants being the most popular. Either saline or silicone implants can be used. Other methods include external expanders (brava device), or fat tranfer via grafts or flaps. A variety of hormones can be used but are generally used only for male to female transgender treatment.

Weight Gain: Breast size is genetically determined. Your body will adjust your breast size with your overall body size. If your thin, gaining weight would likely increase your breast size. You have to decide if an increase in overall size is worth an increase in chest size, if your better served with implants or if your comfortable with your body as is. All are reasonable options!