This is the twelve sided die (D12) from my 'Starry' set.
It measures 20 mm (0.6 inch) across the opposing faces. This design is hollow and was optimised for printing in steel or any of the other metals. In steel this die weighs about 11 grams. The die is well balanced and gives a fair roll.
For all the other dice in this set, please have a look at the
'Starry' category in my shop.