Your baby will prob fit in them for awhile. Like the others said diff brands vary in sizes. Also, it's ahrd for your ob to say how big your baby will be. I've heard heaps of stoies where they say, "WOW you're having a big one" and they're tiny and vice versa so don't be too concerned with that. 6 outfits is not too many and you will get heaps of pressies in bigger sizes. Good luck!