assuming you're talking about 6 sided dice your sample space will be all pairs of the form {d1,d2} where both d1 and d2 are chosen from {1,2,3,4,5,6}.
i.e. {1,1}, {1,2} ..{1,6}, {2,1},....{6,4}, {6,5}, {6,6}.
If you can't distinguish the dice then the pairs {d1,d2} and {d2,d1} are indistinguishable so you only list those once.