|I never had a blow out with my daughter...but she was not tiny (about 4 months old) before I tried the one size adjustable diapers. The two sandies diapers in my stuff are geared for smaller babies, but I've heard the one size will work for newborns as well. She completely breastfed until 6 months, so we had about two months of only breast milk poopies. Then, of course, her number twos changed as we introduced food. The diapers are quite absorbant and are quite adjustable at the leg openings, so I didn't deal with leg leakers, either. They have good coverage overall. That's why those cloth diaper babies look like they have bubble butts. Hope this helps.