With Bonds suits, a size 000 is really a 0000 compared to other clothing. Depending on how big bub is at birth, you would probably only need one 0000 and about 2 or 3 000. My DD was 9.5lb when she was born and was in a size 0000 for all clothing except bonds she was a 000 up until she was about 3 weeks old. Then she went into a 00 bonds and stayed in them until about 4-5 months old.