16mm 20-sided Dice

Here you’ll find a wide variety of 20-sided dice, each sized to fit naturally alongside a standard d6, so you get a balanced, consistent feel across your collection. Please note that while we call these “16mm dice,” the exact measurements can vary a bit depending on the shape, style, and manufacturer or by how they're measured (side to side vs vertex to vertex). If you need precise sizing for a specific d20, just reach out—we’ll be happy to get you the details.