A die in the shape of the symbol PI. To make it even better this die is perfectly weighted and all sides are roughly the same landing area. If rolled on a flat surface this die will roll fair so you can actually use it.
this large 85mm diameter spherical D15 is for the true Math geek. Numbered with all 15 primes of Monstrous M theory it is sure to get people talking. Even though the landing surfaces are all flat there is a large spherical weight which will help the die always land on a valid side.