I use all the different sizes from 3/8 up to and including a 10/8. The bigger the razor the more unwieldy it becomes, meaning that it usually takes some getting used to that is why the majority of them are considered "barbers". I would say that starting out, anything from a 4/8 to a 6/8 would work depending on the size of your hands and how dexterous you are. A 4/8 is usually considered "safe" for a beginner because it is a lot easier to handle. Also consider, Don't go for a Full Hollow blade just yet as those take a bit of getting used to and can be persnickety because they tend to flex. Go for a 1/4 or a 1/2 hollow razor. Also, a round point will be better for you just starting out because there are no pointy ends to gouge and cut your face. I hope this helps.