How big should a nest box be?

I'm just getting into raising rabbits and I'm wondering how big to build my nest boxes. I have New Zealands by the way, I'm guessing the correct size will vary with the size of the doe.


***Moderator Comment***
You're right -- depends on the size of the doe/breed. For a New Zealand which is a standard meat rabbit breed, I'm guessing 11 inches wide, 21 inches long, and about 10 inches deep (with a partial ceiling), give or take an inch or so.