How to fold a letter into an envelope

Steps

1. 1

   Step 1

   
   Materials: any sized letter written on rectangular paper.
2. 2

   Step 2

   
   Place the paper with the writing facing up and the long edges at the top and bottom Fold the upper left corner down and align the side with the bottom edge
3. 3

   Step 3

   
   Result. Unfold
4. 4

   Step 4

   
   Bring the right upper point down and align the side with the bottom edge.
5. 5

   Step 5

   
   Result. Unfold
6. 6

   Step 6

   
   Flip the paper over to the back. Fold up horizontally across where the creases meet at the center
7. 7

   Step 7

   
   Result. Unfold
8. 8

   Step 8

   
   Flip the paper over again. Stick your fingers under the horizontal fold and lift and push the sides towards the center.
9. 9

   Step 9

   
   Continue to push and the sides will fold by themselves downward and the top center will pop up
10. 10

    Step 10

    
    Result. Squash the curve at the top down
11. 11

    Step 11

    
    Result Fold the 2 layers by bringing the right bottom corner up to the top point and align the side to the center fold
12. 12

    Step 12

    
    Result Repeat on the left side
13. 13

    Step 13

    
    Result
14. 14

    Step 14

    
    Unfold the 2 folds you just made in step 11 And step 12
15. 15

    Step 15

    
    Bring the right bottom point up and insert it into the flap on the top
16. 16

    Step 16

    
    Push it in as far as it will go and crease
17. 17

    Step 17

    
    Bring the left bottom point up and insert it into the flap.
18. 18

    Step 18

    
    Push it in as far as it will go and crease. Your letter is now folded into an envelope!