I'm due my 3rd next month and I'm wondering if I need to order some smaller baby grows. I've currently got 6 0-3 month grows but they look quite big. My first baby (dd) was 8 pounds and my second (ds) was 9.3! I bought him up to one month size and it was nearly too small for him when he was born. This baby is also another boy so I'm thinking he might also be big. So difficult as I don't want to waste money. Any suggestions would be really helpful.