Einstein said that God does not play dice with the universe - but if he does, then he’d probably use the tiny die made by Iriso Seimetsu Co. of Japan:

Billed as the smallest dice in the world, each one measures 0.3 x 0.3 x 0.3 mm (for perspective, see the photo above showing one of the die next to a 0.5-mm diameter mechanical pencil lead). The tiny dice are painstakingly crafted one by one from BsBm (brass) in a 9 hour long fabrication process that relies on the latest in micromachining technology. Each one weighs 0.00016 grams and the pips measure 0.05 mm in diameter.

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