Blue - 7 Unusual Dice Set Approved for Use with Dungeon Crawl Classics 7 dice set. Includes the following dice D3, D5, D7, D14, D16, D24 and D30 All dice are between 0.75 and 1 inch in diameter. All dice were chi squared tested for rolling equal probabilities. The D3 is a D6 with Roman Numerals I, II, and III on it twice.