Put simply, Polyhedral Dice are a set of seven dice, including the d4, d6, d8, d10, d12, d20, and the percentile die. The percentile is just another d10, but with double digits.

You need a specific group of dice: a 7- polyhedral dice set (polyhedral = 3-dimensional shapes, like pyramids or cubes), each die with a different number of sides. Each has a purpose and is essential for playing D&D.

When playing Dungeons & Dragons or other tabletop role-playing games, you’ll often use various types of polyhedral dice to determine outcomes within the game. Polyhedral dice are shaped like polyhedra, such as tetrahedrons and icosahedrons. Dice notation is a shorthand way of describing which dice to roll, and how many.