DICE 12-Sided (D12) Polyhedral BLUE Transparent _ Bundle of 20 Dice Set of 20 BLUE (Polyhedral 12-sided) Transparent Dice. Nicknamed D12 dice. Multiple uses for games, countdown dice, math exercises. NOT a stand alone game. Bright BLUE transparent dice. White numbers are recessed into dice for longer lasting life (as opposed to silk-screened on the surface.) Underscore (or sometimes dot marks) marks at base of numbers "6" & "9" to distinguish between the two look-alike numbers. Approximately 3/4 inch wide. This is a set of 20 Identical Blue dice.