How to: Triangle Fold Pocket Square
Triangle Fold
Another popular way to fold the pocket square is the triangular “one tip up” fold. It suits any type of pocket square and dress code. Personally, I like this fold with a solid colored, non-white, pocket square.

Instructions:
Start out by laying the pocket square on a flat surface.
Fold one corner in so that you get two overlapping triangles.
Fold one side of the triangle in.
Do the same on the opposite side.
Finally place the pocket square in your jacket’s pocket.