thanks Kate, I'm going to use newborn size prefolds done up with a snappi and then pop the cover over that. The newborn bummis one I have seems to be a 'little' bit smaller than the newborn BBH one but I think the BBH's cover is really meant to go over a full nappy for a prefold.

None the less it looks like I should get at least 3 more covers. I might hold off on the small size covers as I do have over a dozen pocket nappies which I am thinking I will start using when bubs grows out of the NB size covers with the prefolds.

Thanks again everyone