Step 1: Wear on an old pair of jeans.
Step 2: Mark a horizontal line above each knee cap with white chalk.
Step 3. Roll up a magazine and place it on the inside leg of the jean. Make sure it is positioned underneath the chalk's marking.
Step 4: Make a slit with the razor.
Step 5: Continue making the slit all the way across the knee area. Be careful to not cross the main side hem.
Step 6: Fold the slit upward(half an inch) and trim off the excess with a pair of scissors. Pull on the frays and throw the jeans in the washing machine for a distressed look.
Finish! You now have a pair of edgy, ripped knee denim!