How big, do you know off the top of your head? Argh! I didn't bring it to work with me but I'd say 13 to 14 inches...call it 13 1/2? The holes are bigger and it tapers. A C should be smaller that a B, I think.
Ok...my D is about 12 inches, B is about 14 inches. I'll betcha it's an inch longer than my D. That's what it looks like in the picture Rosie posted.
I really can't wait!!