I wouldn't go based on weight alone. I would go based on your babies measurements. Kaji is 1 ft tall from floor to the tip of his head, and he is 1 ft from base of neck to base of tail. I
would wait until your baby is full grown before making a purchase. The bags are pretty pricey, and your baby hasn't reach full growth yet. She may be 4 lbs, she may be 7. While pricey, I think the bags are so worth it. I use mine A LOT, so it was worth the investment.
