bear in mind though if you use terry flats you would need a bigger cover than if you were using prefold or flanny flats.
e.g. NB size in a prefold but possibly S size in terry flats.
Unless you cut the terries down to size of course!
With DD1 she fit a small BBeehinds cover in terries from very young.
Intend to use prefolds + NB covers this time round so will add my 2 cents when I get there
HTH