How long are they usually in newborn and 1s?

I'd say my son was in newborns for about 2 & a half weeks to 3 maybe & ones for like a month & a half

My son was in newborn until he was 3 weeks. Then he was in size 1 until he was 3.5 months old.

I think my son didn't get into size two unto he was three months

Okay good bc I got alot of newborns and alot of 1s as well

My son wore newborn diapers until he was 2.5 weeks old. They still fit him now but he pees so much they fill up too fast and leak which is why I put him in 1s.