It is very individualistic which double edge razor blade that suits you best and the razor you use. It is good to start with a mild DE razorblade and work the way up and feel the difference between the different brands and types. There are packages with a sample of different double edge razor blades. For you to be able to keep track while testing around, it might be good to use Shaving Diary and make notes. Each double edge razor blade has an estimated sharpness from less sharp, medium, and extra.