Jackson was 6lbs 6 oz - 3046gm and he was in 0000 which was still really big on him. I have bought a few 0000 suits for the hospital which is a pretty safe size even if it's only for a little whie unless you have a huge bubs. Then I bought 4 0000 outfits because I have this thing about taking bubs out of the house in grow suits, is like me leaving the house in my pyjamas - I like them to be dressed! I know it is silly.