The important thing to consider here is that you want it to be high enough so that it is out of the way, but not too high that you will not be able to reach some of the things that you placed on the top shelf. However, if you wish to hang it significantly higher so that it is out of the way and gives a cleaner look, you can always opt to forgo storing things on the base of the unit and simply using the hooks to store your kitchen gear. You will lose quite a bit of storage in doing this, but you will gain the benefit of a cleaner and more organized feel.