To balance preparedness with the risk of overstocking, aim for the following before birth:
Buy 1 to 2 large boxes (totaling ~250–300 diapers) or 2 to 3 packs . Many brands, such as Pampers and Huggies , design NB sizes for babies up to 10 lbs .
Weight is the most accurate guide for sizing, rather than age.
For a newborn's first month, you should plan for approximately . However, because babies grow at vastly different rates, you should avoid buying this entire amount in a single size or brand before the baby arrives. The Core Diaper Math
Have 1 box ready as a backup. Some babies born over 8 or 9 lbs may skip the NB size entirely or outgrow it within days. Sizing and Transition Signs
