We tested over two dozen diaper brands hands-on to evaluate key factors like absorbency, leak protection, fit and design, and overall value. Our process included three types of liquid tests to measure how much each diaper could hold, how quickly it absorbed moisture, how well it held up when fully saturated, and whether it leaked when pressure was applied—like when a baby is sitting or lying down. Every baby is unique, but based on our testing, we’re confident you’ll find a newborn diaper here that works for your little one.