Fold the diaper into an oblong shape. Fold one end over toward the center, creating a doubly thick portion at one end of the diaper.
Place the diaper under your baby, with the thicker end in the front for a boy and in the back for girls; this is where the greater amount of wetness will occur with each baby.
Pull the front part of the diaper up toward the baby's stomach and lay it there. Grasp the right half of the diaper back and wrap it around the baby's waist, overlapping the front diaper part.
Pinch the back and front of the diaper's right side together, one on top of the other, with your first two fingers between the diaper and your baby. Your thumb will be on top of the diaper, holding it together.
Pin the layers together, making sure that you aim the pin toward your fingers and not your baby. Clip the pin closed. Pin the other side of the diaper in the same way.
Fold the diaper in half diagonally to create a triangle. If you have a very large diaper and a very small baby, fold it again to create a four-layered triangle.
Lay the diaper down, with the long end of the triangle at the top and the point aiming down. Slip the top end of the diaper under your baby's bottom and toward her waist.
Pull the diaper point up toward your baby's stomach, then fold the point down inside, creating another layer.
Pull the right triangle point around your baby's waist toward his middle, overlapping the pointed part of the diaper. Hold all the diaper layers together by placing your two first fingers between the diaper and your baby, and your thumb on the outside holding the layers together.
Pin through all the layers of the diaper, aiming the pin at your fingers and not the baby. Pin the other half of the diaper together in the same way.