I had DS in 0000's for about 4 weeks with cloth nappies. As Arimeh said, IB's were fine as they are trim. He was 7lb9oz when he was born and 10lb (4.5kg) by the time they were getting too small.
Even now I am finding some 000's getting a bit snug on him when he has the bulkier nappies on and he's 8 weeks old.