How to fold a letter into an envelope that has an interesting design with flaps at the sides

Steps

1. 1

   Step 1

   
   All you need is a letter or rectangle paper
2. 2

   Step 2

   
   Hold the paper with the writing side facing up. Fold the paper in half lengthwise. Crease and unfold
3. 3

   Step 3

   
   Fold the corners to the center crease
4. 4

   Step 4

   
   Rotate the paper so that the folded points are at top and bottom as shown in the picture Fold it in half by bringing the bottom straight edge up to align with the top straight edge
5. 5

   Step 5

   
   Result. Unfold
6. 6

   Step 6

   
   Fold the top and bottom edges to align with the center crease
7. 7

   Step 7

   
   Result
8. 8

   Step 8

   
   Flip the paper over to the back side Bring the top left corner down to the bottom edge and the bottom right corner up to the top edge
9. 9

   Step 9

   
   Result
10. 10

    Step 10

    
    Flip the paper over to the back and rotate it so the long edges are on the top and bottom Fold the sides straight towards the center at the points the slanted edges end
11. 11

    Step 11

    
    Lift up the top left flap and insert it into the right pocket
12. 12

    Step 12

    
    Push it in all the way and repeat for the right top flap Your letter envelope is finished! Pull on the side flaps to open it.