Definitely at least 4. I would go for 6 like the others say to be on the safe side. It is quite common for newborns to dirty the wrap as well as the nappy so you may well go through a few a day. I am only going to be using wool and have about 16 soakers at last count plus skirties, shorties and longies
:lol. Some of them are smalls so will be too big to start with though.