White Opaque Triantakohedron 30 Sided Dice 1 ea by Koplow Games 35mm die is approx. 1.35, much larger than a standard die (16mm) Sold individually This is a larger than normal die, so you can easily read the numbers on each of the 30 sides. Opaque means this is a solid color die that cannot be seen through Manufactured by Koplow Games, the Nice Dice Company!