We had our shower this weekend and now it's time for DH and I to start rounding out our layette. I've sorted all the clothes we got into 0-3, 3-6, 6-9 and 9-12 month sizes, and we have a few things that are newborn size. Now I've gone over Mrs. Bee's must have lists, but should I be buying in Newborn size or 0-3? Is there a difference? I'm so confused!