Japanese company, Kokuyo, has designed the JUST ONE—a mouse that can go transformer all over your Decepticon ass. This mouse includes three different sized bezels that can easily be swapped in and out adjusting to the needs of everyone from the person with tiny hands, all the way up to the person with gorilla hands. Other than the transformation, this mouse is pretty ho-hum. Two buttons, scroll wheel, corded, 800dpi resolution, etc.
A multi size mouse by Kokuyo [Akihabara]