View Private/ Locked Profile Pictures in Full Size on Facebook

Step by step procedure:

1) Open your Facebook Account :)
2) Now open the profile of your friend whose picture you want to open
3) Now right click on display picture 

4) Click on copy image URL

5) After that open the new tab and paste the link ok Address bar and press enter ..........see below sample.....

6) You Will see now the small picture of your friend

 7) Now find “t1.0-1/p160x160” on the URL & delete the “t1.0-1/p160x160” from the URL and press enter

  Now you are done..  After pressing enter key you will the full size image of your friend.