buy two small bags of new born size and size 1, keep the receipt. after your baby is borned, you will know which size to use. just return the one that you don't need.
btw, newborns that take breastmilk will need more than 2 diapers at night, because they pee and poo at the same time, a lot of time, even at night time. if the newborns feed every 2hours, and poo every two hours, you will need a lot diapers at night time.
