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.