Button the shirt all the way up
Lay the shirt face down on a flat surface
Smooth out all wrinkles with your hands
Fold one sleeve straight across the back
Fold the sleeve back toward the side so it lies neatly along the shirt
Repeat with the other sleeve
Fold each side of the shirt inward toward the center
Make sure the edges are straight and aligned
Fold the bottom of the shirt up toward the collar
Fold again if needed to fit your suitcase or packing cube
Place the folded shirt in your luggage with the collar on top or facing outward
Keep heavier items away from the shirt to reduce wrinkling