This set of 15 dice in Marble Purple includes 3 Arch'd4, 4d6, 2d8, 2d10, d%, d12, and 2 Balance'd20. Role 4 Initiative high-quality dice average about 25% larger than traditional dice and come in a plastic display box. The Arch'd4 is a uniquely shaped die that features large top-face numbers and is easier to read, pick up, and roll. The Balance'd20 has a unique arrangement of numbers so that any 5 adjacent sides add to either 52 or 53 to ensure the most even distribution of outcomes.