The Bébé d'Amour diaper's design is based on a very simple principle: the natural axis of legs.
Please, see the following:
The young baby's legs are naturally centered on each side of the body.
The more we tighten the top of the diaper, the more the space for thighs decreases; we therefore have a perfect adjustment for the young baby.
The toddler's legs are very straight.
The diaper is then tightened enough to obtain a good fit and thus prevent leaks.
90% of babies are in the normal growth curve and will need only one size of the Bébé d'Amour diaper which is the 8 to 30 pound size (3.5 to 13.6 kilos).