In reply to Bob Conley:
As Scott says any decent climbing shop will have the facility for you to hang in the harness to see how it feels/fits. Body shape and fit are what you need to focus on and that inevitably means trying loads to find the one which suits you best.
I have tried wide waist banded harnesses which were downright painful to wear as the stiffened "padding" which was supposed to support me just dug into my ribs and the small of my back the back. This is especially a problem if you are at the limit of the harnesses sizing and have the lumbar support located over one kidney, rather than central in your back (I really like DMMs floating waistband system which removes this problem).