double dominoPrintable Domino Double-Twelve Set. Combinations of the numbers 1-12 are listed as pips on the two halves of each of the tiles in this extended dominoes set. Download in PDF Format (free!)Double-six dominoes, with 28 tiles; Double-nine dominoes, with 55 tiles; Double-fifteen dominoes with 136 tiles; Double-ehteen dominoes with 190 tiles; Getting Started Equipment and number