The unevenly large muscle http://musclesupplementtrials.com/testx-core-need-know-order-inside-info/ is usually due to several reasons, the first cause is either genetic or from birth, and the second is due to the wrong in doing the exercises or the wrong style in the lifestyle. one of the hands too dominant in lifting weights is the most cause. An example is a tennis player or a badminton they have larger muscles on a more dominant hand.
For those of you who are hobby fitness, if you have the unevenly large muscle next to the way overcome it is by giving more dominance to the weak muscles to push or lift the load, while the strongest hand enough to balance only (if using barbell). This can help stimulate the smaller muscles to work harder.
For example, when exercising to form a chest muscle with a bench press give power to the side of your weakest hand to push the load, and let the strongest hand side to balance.
For load, we prefer to use the dumbbell. By using dumbbell loads will be more balanced and evenly split between the right and left, without having to bother to balance because the burden is in both hands.