Seriously, I lean toward larger blades myself, but for a beginner, I think a 5/8 to 6/8 is best and probably a round point in a stiffer grind.
4/8 razors shave (and cut) just as well as 8/8 and can be just as tricky to use IMHO.
I agree on the wee tiny ones shaving just as good and being a bit harder to use.