What Causes Certain Body Parts To Be Larger In Size?

Hi, there are certain parts of my body on the left side that are bigger than my right, yet all the while there are certain parts of my right side bigger than my left. For example, my left breast is larger and so is my left leg, yet my left arm is smaller, and my left eye is smaller than my right eye. What I'm commonly hearing is one side of your body is generally larger than the other side which is perfectly normal since we're not perfectly symmetrical, but as you can understand that is not the case with me. Any information?