The Armadillo, aka Accordion fold, is perfect for larger pocket squares. It suits solid color pocket squares worn with formal suit or tux, as well as patterned pieces paired with casual sports coats. Here is how you create this fold:
Armadillo Pocket Square Fold Step-by-Step:
Lay your hanky down flat.
Create a pleated fold starting at one corner. To do so, fold the pocket square in, and then back down. The pleat should be about 1/2 wide.
Create 7-10 more pleats by repeating step #2.
Now fold the pocket square in half at the center.
Shape the width so that it fits the width of your breast pocket.
Lastly tug the pocket square into your breast pocket.