My dd is 11 weeks old and already needs size 2!!! I mean shes not a particularly big baby. Her 2 mont appt she was like 10.14. But I still cannot believe how fast these babies grow!! Geez!
DS is 17 weeks today and I just bought him size 3 diapers. It seems like he was in 2 for quite awhile but I think he was in them before 11 weeks. He was 8lbs 15 oz when he was born tho, so newborns and size 1 didn't last long
my daughter is the same way shes 11 weeks and size 2 but i think she will take after her daddy because hes 6 foot and shes outgrowing everything like crazy