Instructables
Not enough money to buy a sheath for your knife or just don't know where you can get on, just grab a sheet of paper, a pair of scissors, and very little of experience with origami.
 
Remove these adsRemove these ads by Signing Up

Step 3: Now fold

Picture of Now fold
Then fold it in half.

Step 4: Fold again

Picture of Fold again
Then fold as shown.

Step 6: Open and....... VUALA!

Picture of Open and....... VUALA!
Open the same pocket and your done.

(OPTIONAL)
Take plasic and insert into pocket.