Question: how do you know when to change diaper size?
Answer: Newborn diapers: Up to 10 lbs. Size 1: 8 - 14 lbs. Size 2: 12 - 18 lbs. Size 3: 16 - 21 lbs. Size 4: 20 - 32 lbs. Size 5: 27 - 35 lbs. Size 6: Over 35 lbs.