This is a standard-size version of my Happy Skull d6. Best used in games like Warhammer, Shadowrun, and FATE where a 6 truly is the happiest possible result. The giant 1" version is here: http://www.shapeways.com/model/211616/happy_skull_die_1_.html?gid=ug37365
The dice is, despite appearances, reasonably well balanced. Odd numbered sides are opposed by the next-largest even number, and have a single double-thick tooth to help counter-balance the weight of the extra tooth on the even side. Also, each side is rotated 180 degrees from its opposing face. This should put the center of gravity at or very close to the center of the dice, making for a nice, fair roll.