The binding is one of the things that will make you feel comfortable when you ride and jump from the wake. It’s really important to have bindings that fit your foot size
There are two kinds of bindings "multi-fit" and "fit-size." The "multi-fit" is usually for beginners and can be used by a few people or shared with others.

Perfect-fit			Multi-fit

The "fit-size" usually only one rider can use it or a friend that has the same foot size. This binding is the best for intermediate or advanced levels.

To adjust the bindings on your wakeboard is different from person to person. The best way is to put the wakeboard on the ground and stand on it without the bindings screwed down. Have your normal stance or the stance which you feel most comfortable.

And don't exaggerate the distance between your feet; not too wide or too close. Binding angles also depend on the rider. Always remember to make both bindings the same angle. It is recommended to have the bindings facing forward and slightly bent towards the outside of your stance. Remember to not exaggerate the positions of your bindings to become too pigeon-toed (toes pointing at 90' away from each other).
For example I ride with both feet facing forward without turning the bindings.