What do all the different inch in the razors mean( I.e 5/8", 6/8", 11/16")? Is there any inch that shaves closer when someone becomes experienced? Are there any that are super hard to use? I know from reading that for beginners 5/5" is "best". Any info is greatly appreciated . Just accomplished shave 6 with no nicks WTG and across the grain. Now I just have to start working on against. I am hooked; it's nice to enjoy shaving instead of despising it