which size diapers?

Sarah • Mommy to my 👸 . Baby girl #2 due Oct 1st.
My baby is 6 weeks old and around 11.5 pounds. I still have an unopened box of size 1 diapers but not sure if I should switch to size 2 or continue with size 1. My baby uses 8 diapers a day approximately and I am not sure if she will be able to use all the 216 diapers. What size are your babies currently wearing? I know each baby is different but just want to get an idea.