Could you list the workouts that won't reduce breast size?

There arent: When you lose weight you do not have control over what parts of your body lose over others. A healthy and diet exercise program will cause weight loss throughout your body. If your breasts shrink too much, talk to a plastic surgeon about your options for breast enhancement.

Don't loose weight: The workout is not the culprit, loss of body fat is. All exercises are the same if you replace fat with muscle (desirable) you will loose breast mass.