The Rumparooz One Size Cloth Pocket Diaper is 4 diaper sizes in ONE diaper. Everything you will need from birth (6 lbs) to potty training (35+ lbs) in one set of diapers. This means that the same diapers you buy for your baby to wear home from the hospital are the same diapers your child will potty train out of. No need to buy a set of 24 diapers each time your baby needs the next size up. The Rumparooz One Size Cloth Pocket Diaper will save you around $300.00+ over sized cloth diapers.