Blue - Approved for Use with Dungeon Crawl Classics 14 Unusual Dice Set 14 dice set. Includes the following dice D3, D4, D5, D6, D7, D8, D10, D%10, D12, D14, D16, D20, D24 and D30 All dice are between 0.75 and 1.25 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. The D7 is a special design with an odd number of sides so the numbers are engraved on the edges to show properly when rolled.