Each set of R4I dice averages about 25% larger in size than traditional dice for higher visibility and better rollability! The Arch'd4 is a top-read bigger die that's easier to pick up, roll, and read. The Balance'd20 has a special balanced arrangement of numbers to ensure the most even distribution of rolls; opposite sides add to 21 and adjacent 5 sides add to 52 or 53. 

This set of 15 polyhedral dice contain 3x Arch'd4, 4x D6, 2x D8, 2x D10, 1x D%, 1x D12 & 2x Balance'd20 in a plastic display box.