Lay the handkerchief flat on a clean surface
Smooth out any wrinkles
Fold it in half to form a rectangle or triangle
Fold it in half again if needed
Adjust the edges so they align neatly
Fold the bottom up toward the top if making a pocket square shape
Fold the sides inward to fit the desired size
Press the folds flat with your hand
Place it in a pocket, drawer, or storage area