Someone mentioned I should rate these by skill level. I would say this fold along with the last folding tutorial would have to be set at a beginning tea fold technique.
Four 2.5" squares of 2 sided paper (not cardstock)
Liquid Adhesive (such as Liquid Glass, Diamond Glaze or Delta's liquid Archival glue)
Bone Folder (not necessary but quite handy with the double folds)
With the right side of the paper facing you (pattern), fold the top edge to the bottom edge.
Fold the top layer of the left corner up to the top folded edge making a triangle of the pattern. Repeat with the right corner.
Fold the center corner (bottom point of triangle) up to the long folded edge forming a smaller triangle.
Hold the first piece vertically with the folded edge to the left. Place a dab of adhesive near the top right corner and slide the second piece horizontally with the folded edge to the top. You are creating a right angle with the two folded edges. Repeat this for piece number three.
The last piece slides between the first and the third pieces so that one end is on top of piece three and the other is behind piece one's back flap and this creates a square.
Two final folded samples of the Jacket Fold
Standard size card Sketch using the Jacket Fold with an inchie insert.
Here is a card made using the above sketch and sample. I inserted an inchie I got from a friend of mine Rachele Funk from an inchie swap we participated in together.