My beautiful bubba boy was 11pd 2oz........5.045kg and 59.5cm

I put him in one 0000 Patch suit in hossy, just so he wore it once, the pants were meant to be long, and they were like shorts! He went straight into 000, and was in 00 within about a month. He now wears 0's at 4 months old!! (and size 1 singlets!!)

My advice would be to not buy much to be honest- you really can end up wasting your money on the wrong size clothes that just don't get worn.
Maybe pop some money in a moneybox each week and just buy a couple of basic bonds suits maybe one in 0000 and the rest in 000 before bub comes. That way if bub is small and needs 0000, atleast it can grow into the 000, and you can use the money you saved to go and buy the clothes needed.
You really do get given lots, and this time I didn't really buy any clothes before I had DS, as I had learnt from last time, and I didn't have to buy anything until he was about a month old!
If it was me I would be buying bits and pieces like wipes and sposies, or cloth nappies depending which way you go, because these things you know you will be using a lot of.
Just my two cents...Good luck and have a healthy and happy pregnancy!