A 15-set of large high-visibility polyhedral diffusion dice. Each set of R4I dice averages about 25% larger in size than traditional dice for higher visibility and better rollability! The Arch'd d4 is a better alternative to the traditional d4; bigger, easier to pick up, and easier to roll than traditional d4s. The Balance'd d20 provides a more even distribution of results by ensuring all adjacent groups of 5 sides add to 52 or 53. Sets of 15 include 3 Arch'd d4, 4 d6, 2 d8, 2 d10, d%, d12, and 2 Balance'd d20.