Jelqing will work if you do it right and follow good quality instructions. Most people try to follow one or two exercises and do them again and again to see if they can increase the size of their penis.
Use a good program, one website that tracks the best penis exercises program is
http://www.checkb4youbuy.com/penisadvantagereview.html
Use one of the programs there and give it about 6-8 weeks to see results. Best of luck