I'd definitely get newborn clothes and even tiny baby,my son was 8lbs 9oz and he was in up to 6lbs tiny baby clothes for a good few weeks. I really disagree with just buying 0-3 they would has absolutely drowned my son, I wouldn't wear clothes that are hanging off me so I why would I do it to my baby, I really hate seeing babies with absolutely huge baggy clothes on, I like things that fit lol x