When did your baby outgrow newborn diapers?

Lynndaline

7 weeks old, 11 lbs 6 oz and still in newborn diapers. I tried size 1 in the same brand and it was no where close to fitting. She is also almost 25inches so she’s tall and lean. I love she still fits newborns but at the same time I’m scared to by many Incase she grows before I can use all or most of them. Any other moms going through or have gone through this. When did your baby(ies) outgrow newborn diapers?