Yo what do those numbers mean? I've never gone in my barbershop and asked for anything like this; I normally tell the barer to either fade it, edge it up, shape it up, low fade, or shadow fade.
Seriously? It's not like Lost or anything. The numbers are just an indication of height. It's a setting on clippers.
I don't do fades or anything like that. I know how I like my hair so I know exactly what guards to ask for.