If you mean the size in diameter, then I tend to not make them more than about that too 8".So how small do you split your fire wood? A 8 inch round will fit in the door of my England 28-3500 so i tend not to even bother splitting them. I do tend to work some down to about 4 inch tringles or squares to fill it up at night and if I want a untended all day fire.
Al