I have a few questions and very much new to the art of shaving. I noticed there are different sizes of stright razors. 4/8,5/8,6/8. is that the length of the razor or width. and how do i know which will suit me the best? I also noticed there are different widths,and not sure what the different sizes mean. i am looking to buying this stright razor and i also noticed there is an option that the razor can be pre honed. now if its prehoned does that mean i only need to purchase a strop? or do i have to buy a knife stone and hone it myself ?thank you again,And looking forward to your replies.