Wonder-Fulls One Size Pocket Diaper Microterry Inserts are designed to be functional yet economical. This is like getting two inserts for just over the price of one. Talk about a "Bang for you buck"! Wonder-Fulls eliminates the need for multi-sized inserts! They are super trim yet provide better coverage where your baby needs it most and are contured for a gentle less bulky stride. For newborns and small infants, simply unsnap the set and use only the smaller insert. For infants, just use the larger insert and for larger infants and toddlers, snap back together and use the set for a total of 6 thirsty layers of microterry. Wonder-Fulls fit perfectly in Fuzzi Bunz and other pocket diapers.