Yes it's possible to enlarge your penis without surgery, look at this thread: http://www.medhelp.org/posts/Sexual-Health/Is-the-andropenis-penis-extender-a-scam-/show/1255569
The Andropenis Gold is a legitimate penis enlarger, however I have also found another I believe to be of better quality and looks a lot more comfortable, it's called Jes Extender.
I'm still researching but so far they are the only two who are actually manufactured by genuine Medical companies. All the others have fancy websites but no actual approvals by any health authority so it tells you they are probably cheaply made in Asia somewhere to cut costs. Something I'm not interested to invest in.
Do your own research: Andropenis Gold and also Jes Extender Gold.