Not eligible for distribution question.
If yoiu choose a size that says not elligible for distribution, does this mean that you can only get prints for yourself, or can you still publish it for sale pod in Lulu, (I understand that they won't distribute it elsewhere if it's one of those sizes, I just can't work out f it means they won't sell it all even on their website.)
Next question is WHY are those sizes not suitable for distribution? The digest size appears to be the standard paperback size that you see in shops here in the UK.
(Having said that I'm going by dimensions only. 2 weeks on from it being despatched I am still waiting for my print to arrive so I haven't yet seen a digest sized book from here.)