i used to ask people to buy me newborn stuff in 000, Xander was born 9lb2oz but long (54cm) so went straight into 000. Do not bother with 00000 unless your baby is prem or very small at birth, my daughter was about 2kg when she fit into 00000. What i found ther best was just buying 000 for when you had to go buy baby stuff ;) and if you need any 0000, just buy it later.
My son was born March, when it was hot, he spent most of his time i singlets and nappies, plus some short one pieces. Dont buy too much, you can always get more later!! (BTW ebay had 15 wondersuits, pre loved in 4 colours going for about $10 somewhere atm, just noticed it earlier... all 000)
