D4
Tetrahedron often used for damage rolls.
Different Types of Dice
D6
The classic cube — standard board game die.
D8
Octahedron used in some roleplaying games.
D10
Used for percentile and many systems.
D12
Less common but useful for certain mechanics.
D20
Popular in roleplaying games like D&D.
Specialty Dice
Custom shapes, percentile dice, and novelty dice exist for collectors and players.