This pin is in a series based on a series of watches entitled "Brights," designed by Lindsay Voigt. It is a circular pin with a bunch of silver and blue mickey heads on a white background. The 'hidden' mickey is the smallest silver mickey head in the top left. This pin will only be available by trading with a cast member.
The back of the pin reads, "Hidden Mickey Pin 2 of 5".
Note: This pin is often faked.