These unique hollow 12 sided dice are great to add to your already massive dice collection. They are great gifts, fun to use as decoration but of course the main purpose of these is to be used in dice- or boardgames. The dice measure about 20mm (0.78") in diameter just like most dice and weigh about the same too. The different walls have a slightly different thickness to compensate for the amount of holes so every side is equal in weight giving the dice the most random roll possible.