Ooooh a little boy!!! How lovely hun

Personally, I wouldn't worry about any 0000 - they grow so quick that 000 should be fine in most onesies - separates are different and you may need 0000 - but possibly not either. And being in Perth and he being a summer bub, he aint going to need a lot of clothes anyway unless you have a fully airconditioned house.

Target brand clothes aren't too bad, but with a boy, there are bugger all choices - their summer range for boys this year is pretty ordinary I think. So I would just get the basics from there and get outfits from somewhere else.