Larry Jaques says...

P.P.S: Note to Hax: You can easily hone a 2" wide iron on a 1x3"
diamond hone plate once you learn how. Can you say "figure 8"? I knew
you could. (2x6" is gravy; an aircraft carrier.)

But my comments concerned the size needed for card scrapers and when
using honing guides. I've used a 2x6" stone in both of those cases, but
it was far from ideal.