Meet the Xinci Virtual Reality Headset: a mobile VR headset that works with 4-6″ smartphones for 3D movies and games. It is designed to provide you with an immersive VR experience on your phone. The strap is adjustable. The headset has a heat dissipating design.
Xinci VR supports Samsung, iPhones, Blackberry, and a wide variety of smartphones. It costs under $26.