suggest some tips to reduce the breast size
Do weight lifting to increase your lean body mass. When your overall body fat decreases, the fat in your breast tissue will also shrink in size.
Just read a great advice on decreasing breast size:
https://www.steadyhealth.com/Could_exercise_decrease_my_breast_size__t83852.html
https://www.steadyhealth.com/Could_exercise_decrease_my_breast_size__t83852.html